Add editor-only floor cut to hide primitives above the MandatoryAnchor

Per-component visibility/collision toggle gated on bounds-min Z vs
(AnchorZ + Height). Snapshotted before mutation and restored on
disable, so the feature is non-destructive. Wired into the toolbars of
both Slate widgets and exposed as Blueprint methods on the UMG widget.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/memory/MEMORY.md

@@ -1,4 +1,4 @@
-- [PS_Editor plugin project](project_ps_editor.md) — Runtime editor plugin for UE 5.5, Phases 1-4 done, outline material pending
+- [PS_Editor plugin project](project_ps_editor.md) — Runtime editor plugin for UE 5.7 (migrated from 5.5 in April 2026), Phases 1-4 done, outline material pending
 - [Underscore naming](feedback_naming.md) — Always use PS_Editor_ prefix with underscores in file/class names
-- [UE5 build process](reference_build.md) — CLI build command for the project (Build.bat path, target name, flags)
+- [UE5 build process](reference_build.md) — CLI build command for PROSERVE_UE_5_7 (5.5 host deprecated), Build.bat path, target name, junction check
 - [Build workflow](feedback_build_workflow.md) — Prefer Live Coding (Ctrl+Alt+F11) when UE is open, CLI build only when UE is closed

.claude/memory/project_ps_editor.md

@@ -1,10 +1,10 @@
 ---
 name: PS_Editor plugin project
-description: Runtime editor plugin for UE 5.5 - object placement, scene editing, JSON save/load in packaged builds
+description: Runtime editor plugin for UE 5.7 - object placement, scene editing, JSON save/load in packaged builds
 type: project
 ---
 
-PS_Editor is a runtime editor plugin for Unreal Engine 5.5 for the PROSERVE project.
+PS_Editor is a runtime editor plugin for Unreal Engine 5.7 for the PROSERVE project. The plugin was started on UE 5.5; the host project migrated to UE 5.7 in April 2026 and the plugin follows. Build details in reference_build.md.
 
 Key decisions:
 - UI: UMG driven by C++ (Slate)

.claude/memory/reference_build.md

@@ -1,18 +1,30 @@
 ---
 name: UE5 build process
-description: How to build the PS_ProserveEditor UE 5.5 project from command line on Windows
+description: How to build the PROSERVE host project (currently UE 5.7) from command line on Windows
 type: reference
 ---
 
-UE 5.5 is installed at `C:\Program Files\Epic Games\UE_5.5` (found via registry key `HKLM\SOFTWARE\EpicGames\Unreal Engine\5.5`).
+The PS_Editor plugin is developed in `E:\ASTERION\GIT\PS_Editor\Unreal\Plugins\PS_Editor` and consumed by the PROSERVE host project via an NTFS junction. Always build the host project, not the plugin in isolation.
+
+**Current host project (April 2026):** `E:\ASTERION\SVN\DEV\PROSERVE_UE_5_7\PROSERVE_UE_5_7.uproject` (Unreal Engine 5.7)
+
+The previous 5.5 host (`PROSERVE_UE_5_5`) is deprecated — do not use unless explicitly asked.
+
+UE 5.7 is installed at `C:\Program Files\Epic Games\UE_5.7` (found via registry key `HKLM\SOFTWARE\EpicGames\Unreal Engine\5.7`).
 
 Build command (Editor target, Development):
 ```
-"C:/Program Files/Epic Games/UE_5.5/Engine/Build/BatchFiles/Build.bat" PS_ProserveEditorEditor Win64 Development -Project="C:/ASTERION/GIT/PS_ProserveEditor/Unreal/PS_ProserveEditor.uproject" -WaitMutex -FromMsBuild
+"C:/Program Files/Epic Games/UE_5.7/Engine/Build/BatchFiles/Build.bat" PROSERVE_UE_5_7Editor Win64 Development -Project="E:/ASTERION/SVN/DEV/PROSERVE_UE_5_7/PROSERVE_UE_5_7.uproject" -WaitMutex -FromMsBuild
 ```
 
-**How to apply:** Use this command to compile after code changes. Timeout should be set to 600000ms (10 min) for safety. The target name is `PS_ProserveEditorEditor` (Editor suffix) for editor builds.
+**How to apply:** Use this command to compile after code changes. Timeout should be set to 600000ms (10 min) for safety. The target name is `PROSERVE_UE_5_7Editor` (Editor suffix) for editor builds.
 
 **When to use CLI vs Live Coding:**
 - Live Coding (Ctrl+Alt+F11): .cpp only changes (no new UCLASS, USTRUCT, UENUM, UPROPERTY in headers)
 - Full CLI build (UE must be closed): new files, header changes with new reflected types, Build.cs changes
+
+**Plugin junction verification:**
+```
+ls -la E:/ASTERION/SVN/DEV/PROSERVE_UE_5_7/Plugins/ | grep PS_Editor
+```
+Should show a symlink pointing to `/e/ASTERION/GIT/PS_Editor/Unreal/Plugins/PS_Editor`. If broken, the host project will build against a stale or missing plugin copy.

CLAUDE.md

@@ -1,7 +1,7 @@
 # PS_ProserveEditor - Project Guidelines
 
 ## Project Overview
-Unreal Engine 5.5 project with runtime editor plugin (PS_Editor). The plugin enables runtime scene editing in packaged builds: object placement, property editing, scenario definition, splines, lighting, and JSON scene save/load.
+Unreal Engine 5.7 project with runtime editor plugin (PS_Editor). The plugin enables runtime scene editing in packaged builds: object placement, property editing, scenario definition, splines, lighting, and JSON scene save/load. The plugin was started on UE 5.5; the host project migrated to UE 5.7 in April 2026.
 
 ## Architecture
 - **Plugin**: PS_Editor (runtime plugin, must work in packaged builds)
@@ -57,6 +57,29 @@ if (UPS_Editor_SceneLoader::IsInEditorMode())
     // editor-only behaviour
 }
 ```
+
+### Known PIE-only AI quirk — use Standalone for AI testing
+
+When the editor's "Play" button calls `UGameplayStatics::OpenLevel(BaseLevel)` from a PIE
+session, the BaseLevel's `RecastNavMesh` actor ends up pending-kill at registration time
+(UE logs `RegistrationFailed_DataPendingKill` ×2 and silently spawns an empty
+`AbstractNavData-Default` as fallback). All `FindPathAsync` / `ProjectPointToNavigation`
+queries return empty after that — pathfinding looks broken with no error.
+
+This is **PIE-specific**:
+- Standalone Game (Window → Standalone) — works correctly
+- Packaged builds — work correctly
+- PIE direct on BaseLevel (no editor map / OpenLevel involved) — works correctly
+- PIE on editor map → click Play (OpenLevel transition inside PIE) — broken
+
+Multiple workaround attempts have all failed (cascading re-registrations through
+`RegisterNavData` / `OnInitializeActors` / `AddNavigationSystemToWorld` / `Build` /
+`SpawnMissingNavigationData`; transition map; duplicated sublevel suffixed `_default`).
+The cause is internal to PIE's OpenLevel handling and cannot be fixed from the plugin
+side without engine modifications.
+
+**Workflow:** for AI iteration, run **Standalone Game** instead of PIE. It exercises the
+exact same code path as packaged builds.
 or gate on `bIsCurrentlyLoading` to skip BP init during JSON restore.
 
 ## UI Modes — IMPORTANT for widget changes
@@ -83,15 +106,28 @@ Symptom that the wrong widget was edited: logs you added don't appear in the Out
 - When fixing a bug, fix the root cause, not the symptom.
 - If something requires error handling or validation to work reliably, include it without asking.
 
+## Workflow — CRITICAL
+- **Do not make behavior / logic changes without first explaining the plan and waiting for the
+  user's go-ahead.** Explain what the change will be, why it fixes the issue, and what side
+  effects it could have. Only after the user approves (or asks to proceed), apply the edit.
+- Diagnostic-only additions (temporary `UE_LOG`, read-only inspections) are fine without
+  approval because they can't regress the project.
+- Refactors, algorithm changes, comportement changes, new defaults, removed features — all
+  require approval first, even when they seem obvious.
+- When revealing new data (e.g. logs) suggests a fix, STATE the proposed fix in plain words
+  and wait. Don't pre-emptively write + apply the code change in the same turn.
+
 ## Build
-- Engine: Unreal Engine 5.5
+- Engine: Unreal Engine 5.7 (host project migrated from 5.5 in April 2026)
-- Plugin location: `Unreal/Plugins/PS_Editor/`
+- Plugin location: `Unreal/Plugins/PS_Editor/` (consumed via NTFS junction from the PROSERVE host project's `Plugins/` directory)
-- Game module: `PS_ProserveEditor` (in `Unreal/Source/PS_ProserveEditor/`)
+- Host project: `E:\ASTERION\SVN\DEV\PROSERVE_UE_5_7\PROSERVE_UE_5_7.uproject` — always build this, not the plugin in isolation
+- Game module: `PROSERVE_UE_5_7` (in the host project's `Source/`)
 - CLI build command (Editor, Development):
   ```
-  "<UE_INSTALL>/Engine/Build/BatchFiles/Build.bat" PS_ProserveEditorEditor Win64 Development -Project="<REPO>/Unreal/PS_ProserveEditor.uproject" -WaitMutex -FromMsBuild
+  "C:/Program Files/Epic Games/UE_5.7/Engine/Build/BatchFiles/Build.bat" PROSERVE_UE_5_7Editor Win64 Development -Project="E:/ASTERION/SVN/DEV/PROSERVE_UE_5_7/PROSERVE_UE_5_7.uproject" -WaitMutex -FromMsBuild
   ```
-  UE install path can be found via registry: `HKLM\SOFTWARE\EpicGames\Unreal Engine\5.5` > `InstalledDirectory`
+  UE install path can be found via registry: `HKLM\SOFTWARE\EpicGames\Unreal Engine\5.7` > `InstalledDirectory`
+- The 5.5 host (`PROSERVE_UE_5_5`) is deprecated — do not build against it unless explicitly asked.
 
 ## Project Memory
 Shared project memory is stored in `.claude/memory/` (versioned in the repository). When starting a new session on any machine, read these files to restore context:

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_CameraStart.h

@@ -20,11 +20,11 @@ public:
 #if WITH_EDITORONLY_DATA
 protected:
 	/** Icon visible in the editor viewport. Override the sprite in a derived Blueprint if needed. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	TObjectPtr<class UBillboardComponent> SpriteComponent;
 
 	/** Arrow showing the view direction in the editor viewport. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	TObjectPtr<class UArrowComponent> ArrowComponent;
 #endif
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_GameInstanceSubsystem.cpp

@@ -1,13 +1,19 @@
 #include "PS_Editor_GameInstanceSubsystem.h"
+#include "PS_Editor_SceneLoader.h"
+#include "PS_Editor_SceneData.h"
 #include "Kismet/GameplayStatics.h"
+#include "Misc/FileHelper.h"
+#include "JsonObjectConverter.h"
 
-void UPS_Editor_GameInstanceSubsystem::SetPendingScenario(const FString& ScenarioName, const FString& BaseLevel)
+void UPS_Editor_GameInstanceSubsystem::SetPendingScenario(const FString& ScenarioName, const FString& BaseLevel, uint8 ScenarioType)
 {
 	PendingScenarioName = ScenarioName;
 	PendingBaseLevel = BaseLevel;
+	PendingScenarioType = ScenarioType;
 	LastEditedScenarioName = ScenarioName;
 	LastEditedBaseLevel = BaseLevel;
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Pending scenario set: '%s' (base level: '%s')"), *ScenarioName, *BaseLevel);
+	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Pending scenario set: '%s' (base level: '%s', type: %u)"),
+		*ScenarioName, *BaseLevel, ScenarioType);
 }
 
 FString UPS_Editor_GameInstanceSubsystem::ConsumePendingScenario()
@@ -45,3 +51,44 @@ void UPS_Editor_GameInstanceSubsystem::ReturnToEditor(const UObject* WorldContex
 
 	OpenEditor(WorldContextObject);
 }
+
+bool UPS_Editor_GameInstanceSubsystem::ReadScenarioMetadata(const FString& ScenarioName, uint8& OutScenarioType, FString& OutBaseLevel) const
+{
+	OutScenarioType = 0;
+	OutBaseLevel.Empty();
+
+	if (ScenarioName.IsEmpty())
+	{
+		return false;
+	}
+
+	const FString FilePath = UPS_Editor_SceneLoader::GetSceneFilePath(ScenarioName);
+	FString JsonString;
+	if (!FFileHelper::LoadFileToString(JsonString, *FilePath))
+	{
+		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: ReadScenarioMetadata — file not found: %s"), *FilePath);
+		return false;
+	}
+
+	// Parse the full SceneData. We could parse just the metadata fields with a custom
+	// reader, but FJsonObjectConverter is fast enough for the scenario sizes we deal with
+	// (tens of actors max), and reusing the same struct keeps version handling consistent.
+	FPS_Editor_SceneData SceneData;
+	if (!FJsonObjectConverter::JsonObjectStringToUStruct(JsonString, &SceneData, 0, 0))
+	{
+		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: ReadScenarioMetadata — failed to parse JSON for '%s'"), *ScenarioName);
+		return false;
+	}
+
+	OutScenarioType = SceneData.ScenarioType;
+	OutBaseLevel = SceneData.LevelName;
+	return true;
+}
+
+uint8 UPS_Editor_GameInstanceSubsystem::GetScenarioTypeFromFile(const FString& ScenarioName) const
+{
+	uint8 Type = 0;
+	FString DummyLevel;
+	ReadScenarioMetadata(ScenarioName, Type, DummyLevel);
+	return Type;
+}

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_GameInstanceSubsystem.h

@@ -18,41 +18,68 @@ class PS_EDITOR_API UPS_Editor_GameInstanceSubsystem : public UGameInstanceSubsy
 
 public:
 	/** Scenario name to load on the next level. Set by PROSERVE or Play button, consumed on load. */
-	UPROPERTY(BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(BlueprintReadWrite, Category = "PS_Editor")
 	FString PendingScenarioName;
 
 	/** Base level name associated with the pending scenario. */
-	UPROPERTY(BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(BlueprintReadWrite, Category = "PS_Editor")
 	FString PendingBaseLevel;
 
 	/** Last scenario/base level edited. Persists after consume — used by ReturnToEditor. */
-	UPROPERTY(BlueprintReadOnly, Category = "ASTERION|PS_Editor")
+	UPROPERTY(BlueprintReadOnly, Category = "PS_Editor")
 	FString LastEditedScenarioName;
 
-	UPROPERTY(BlueprintReadOnly, Category = "ASTERION|PS_Editor")
+	UPROPERTY(BlueprintReadOnly, Category = "PS_Editor")
 	FString LastEditedBaseLevel;
 
 	/** Name of the editor map to return to. Set this once at startup. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	FString EditorMapName;
 
 	/** True when the Play button was pressed (gameplay mode). False when just loading/editing a scenario. */
-	UPROPERTY(BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(BlueprintReadWrite, Category = "PS_Editor")
 	bool bIsPlayMode = false;
 
-	/** Set pending scenario + base level (for opening the editor or gameplay). */
+	/** Pending scenario type as uint8 — index into UPS_Editor_MasterCatalog::ScenarioTypeEnum.
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	 *  Set by the Play button alongside PendingScenarioName. The gameplay GameMode reads it
-	void SetPendingScenario(const FString& ScenarioName, const FString& BaseLevel);
+	 *  (Byte to Enum) and routes its scenario-type-specific logic. Default 0 = first enum entry. */
+	UPROPERTY(BlueprintReadWrite, Category = "PS_Editor")
+	uint8 PendingScenarioType = 0;
+
+	/** Set pending scenario + base level + type (for opening the editor or gameplay). */
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
+	void SetPendingScenario(const FString& ScenarioName, const FString& BaseLevel, uint8 ScenarioType = 0);
+
+	/**
+	 * Pre-parse a scenario file from disk (without spawning anything) to extract its
+	 * persisted metadata: scenario type and base level. Use this from PROSERVE GameMode
+	 * BeginPlay (or earlier) to know what type a scenario is BEFORE deciding to load it,
+	 * when the standard Play-button flow hasn't populated PendingScenarioType.
+	 *
+	 * @param ScenarioName    Name of the scenario file (without extension).
+	 * @param OutScenarioType Set to the scenario's saved type (uint8 index into MasterCatalog::ScenarioTypeEnum). 0 on failure.
+	 * @param OutBaseLevel    Set to the scenario's saved base level name. Empty on failure.
+	 * @return True if the file was found and parsed successfully.
+	 */
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
+	bool ReadScenarioMetadata(const FString& ScenarioName, uint8& OutScenarioType, FString& OutBaseLevel) const;
+
+	/**
+	 * Convenience: read just the scenario type from a file. Returns 0 if the file isn't
+	 * found / can't be parsed (which is also the default for a saved-but-untyped scenario).
+	 */
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "PS_Editor")
+	uint8 GetScenarioTypeFromFile(const FString& ScenarioName) const;
 
 	/** Consume the pending scenario (reads and clears). */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	FString ConsumePendingScenario();
 
 	/** Open the editor with the current pending scenario + base level. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor", meta = (WorldContext = "WorldContextObject"))
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor", meta = (WorldContext = "WorldContextObject"))
 	void OpenEditor(const UObject* WorldContextObject);
 
 	/** Return to the editor, keeping the current base level and scenario. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor", meta = (WorldContext = "WorldContextObject"))
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor", meta = (WorldContext = "WorldContextObject"))
 	void ReturnToEditor(const UObject* WorldContextObject);
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_GameMode.h

@@ -17,6 +17,6 @@ public:
 	APS_Editor_GameMode();
 
 	/** Whether the editor is currently in edit mode (vs play/preview mode). */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	bool bIsEditMode = true;
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_Pawn.cpp

@@ -2,6 +2,8 @@
 #include "Camera/CameraComponent.h"
 #include "GameFramework/SpringArmComponent.h"
 #include "Components/PostProcessComponent.h"
+#include "Materials/MaterialInterface.h"
+#include "UObject/ConstructorHelpers.h"
 #include "EnhancedInputComponent.h"
 #include "EnhancedInputSubsystems.h"
 #include "InputAction.h"
@@ -10,6 +12,9 @@
 #include "InputTriggers.h"
 #include "GameFramework/PlayerController.h"
 #include "PS_Editor_SelectionManager.h"
+#include "PS_Editor_GroundSnap.h"
+#include "PS_Editor_NavUtils.h"
+#include "PS_Editor_SpawnManager.h"
 #include "PS_Editor_PlayerController.h"
 #include "PS_Editor_Gizmo.h"
 #include "PS_Editor_UndoManager.h"
@@ -43,24 +48,27 @@ APS_Editor_Pawn::APS_Editor_Pawn()
 	OutlinePostProcess = CreateDefaultSubobject<UPostProcessComponent>(TEXT("OutlinePostProcess"));
 	OutlinePostProcess->SetupAttachment(RootScene);
 	OutlinePostProcess->bUnbound = true; // Apply to entire scene
+
+	// Hard-ref the outline material at CDO-construction time so the cooker follows it into
+	// packaged builds. Replaces the old runtime LoadObject<> soft-string path.
+	static ConstructorHelpers::FObjectFinder<UMaterialInterface> OutlineMatFinder(
+		TEXT("/PS_Editor/M_PS_Editor_SelectionOutline.M_PS_Editor_SelectionOutline"));
+	if (OutlineMatFinder.Succeeded())
+	{
+		OutlineMaterial = OutlineMatFinder.Object;
+	}
 }
 
 void APS_Editor_Pawn::BeginPlay()
 {
 	Super::BeginPlay();
 
-	// Load outline post-process material
+	// OutlineMaterial is resolved in the ctor via ConstructorHelpers (hard cook ref).
-	UMaterialInterface* OutlineMat = LoadObject<UMaterialInterface>(
+	if (OutlineMaterial && OutlinePostProcess)
-		nullptr, TEXT("/PS_Editor/M_PS_Editor_SelectionOutline.M_PS_Editor_SelectionOutline"));
-	if (OutlineMat && OutlinePostProcess)
 	{
-		OutlinePostProcess->Settings.WeightedBlendables.Array.Add(FWeightedBlendable(1.0f, OutlineMat));
+		OutlinePostProcess->Settings.WeightedBlendables.Array.Add(FWeightedBlendable(1.0f, OutlineMaterial));
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Selection outline material loaded"));
 	}
-
+	else if (!OutlineMaterial)
-	// TODO: Spline occluded PP material — disabled for now, depth comparison unreliable
-	// Consider translucent second-pass approach instead of post-process
-	else
 	{
 		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: Outline material /PS_Editor/M_PS_Editor_SelectionOutline not found. "
 			"Create a Post Process material in Plugins/PS_Editor/Content/"));
@@ -71,6 +79,26 @@ void APS_Editor_Pawn::Tick(float DeltaTime)
 {
 	Super::Tick(DeltaTime);
 
+	// Focus animation: smoothly interpolate camera location/rotation toward the framed
+	// selection. Uses ease-in-out (smoothstep) so the camera doesn't snap at the boundaries.
+	if (bIsFocusing)
+	{
+		FocusElapsed = FMath::Min(FocusElapsed + DeltaTime, FocusDuration);
+		const float Linear = FocusElapsed / FocusDuration;
+		const float Alpha = Linear * Linear * (3.0f - 2.0f * Linear); // smoothstep
+		const FVector NewLoc = FMath::Lerp(FocusStartLocation, FocusTargetLocation, Alpha);
+		const FRotator NewRot = FMath::Lerp(FocusStartRotation, FocusTargetRotation, Alpha);
+		SetActorLocation(NewLoc);
+		SetActorRotation(NewRot);
+		if (FocusElapsed >= FocusDuration)
+		{
+			bIsFocusing = false;
+			// Sync orbit state so a subsequent Alt+drag pivots around the new focal point.
+			OrbitYaw = NewRot.Yaw;
+			OrbitPitch = NewRot.Pitch;
+		}
+	}
+
 	if (APlayerController* PC = Cast<APlayerController>(GetController()))
 	{
 		bAltHeld = PC->IsInputKeyDown(EKeys::LeftAlt) || PC->IsInputKeyDown(EKeys::RightAlt);
@@ -223,6 +251,16 @@ void APS_Editor_Pawn::CreateInputActions()
 	IA_Cancel = NewObject<UInputAction>(this, TEXT("IA_Cancel"));
 	IA_Cancel->ValueType = EInputActionValueType::Boolean;
 	EditorMappingContext->MapKey(IA_Cancel, EKeys::Escape);
+
+	// Focus selection (Maya/Blender style)
+	IA_Focus = NewObject<UInputAction>(this, TEXT("IA_Focus"));
+	IA_Focus->ValueType = EInputActionValueType::Boolean;
+	EditorMappingContext->MapKey(IA_Focus, EKeys::F);
+
+	// Toggle navmesh visualization (mimics UE editor's P key)
+	IA_ToggleNavMesh = NewObject<UInputAction>(this, TEXT("IA_ToggleNavMesh"));
+	IA_ToggleNavMesh->ValueType = EInputActionValueType::Boolean;
+	EditorMappingContext->MapKey(IA_ToggleNavMesh, EKeys::P);
 }
 
 void APS_Editor_Pawn::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
@@ -269,6 +307,8 @@ void APS_Editor_Pawn::SetupPlayerInputComponent(UInputComponent* PlayerInputComp
 	EIC->BindAction(IA_SplineMode, ETriggerEvent::Started, this, &APS_Editor_Pawn::HandleSplineMode);
 	EIC->BindAction(IA_Confirm, ETriggerEvent::Started, this, &APS_Editor_Pawn::HandleConfirm);
 	EIC->BindAction(IA_Cancel, ETriggerEvent::Started, this, &APS_Editor_Pawn::HandleCancel);
+	EIC->BindAction(IA_Focus, ETriggerEvent::Started, this, &APS_Editor_Pawn::HandleFocus);
+	EIC->BindAction(IA_ToggleNavMesh, ETriggerEvent::Started, this, &APS_Editor_Pawn::HandleToggleNavMesh);
 }
 
 // ---- Input Handlers ----
@@ -442,6 +482,21 @@ void APS_Editor_Pawn::HandleLook(const FInputActionValue& Value)
 			const FQuat RotationQuat(AxisDir, FMath::DegreesToRadians(SnapAngle));
 			const FVector GizmoLoc = GizmoDragPlaneOrigin;
 
+			// ChildMovable rotation: rotate only the active child instead of all selected actors.
+			// We compose the delta quat onto the initial rotation captured at drag start —
+			// reading the live value each frame would feed back through GetChildRotation and
+			// drift if the BP impl clamps axes.
+			if (ActiveSplinePointIndex >= 0
+				&& DraggedSplineActor.IsValid()
+				&& DraggedSplineActor->GetClass()->ImplementsInterface(UPS_Editor_ChildMovable::StaticClass())
+				&& SplinePointDragInitialRotations.IsValidIndex(ActiveSplinePointIndex))
+			{
+				const FQuat OrigRot = SplinePointDragInitialRotations[ActiveSplinePointIndex].Quaternion();
+				const FRotator NewRot = (RotationQuat * OrigRot).Rotator();
+				IPS_Editor_ChildMovable::Execute_RotateChild(DraggedSplineActor.Get(), ActiveSplinePointIndex, NewRot);
+			}
+			else
+			{
 				for (int32 i = 0; i < Selected.Num() && i < GizmoDragInitialTransforms.Num(); ++i)
 				{
 					if (AActor* Actor = Selected[i].Get())
@@ -454,6 +509,7 @@ void APS_Editor_Pawn::HandleLook(const FInputActionValue& Value)
 					}
 				}
 			}
+		}
 		else if (Mode == EPS_Editor_TransformMode::Scale)
 		{
 			// Use combined mouse X+Y screen movement to drive scale
@@ -674,6 +730,9 @@ void APS_Editor_Pawn::HandleLeftClickStarted(const FInputActionValue& Value)
 				{
 					ActiveSplinePointIndex = ChildIdx;
 					DraggedSplineActor = ActiveActor;
+					// Clear any previous highlight before applying the new one — without this, picking
+					// a different child leaves the prior one stuck in highlight state.
+					IPS_Editor_ChildMovable::Execute_ClearChildHighlight(ActiveActor);
 					IPS_Editor_ChildMovable::Execute_HighlightChild(ActiveActor, ChildIdx);
 
 					if (UPS_Editor_SelectionManager* SM = EdPC_CM->GetSelectionManager())
@@ -753,7 +812,7 @@ void APS_Editor_Pawn::HandleLeftClickStarted(const FInputActionValue& Value)
 								InsertSM->SetTransformMode(EPS_Editor_TransformMode::Translate);
 							}
 
-							UE_LOG(LogTemp, Log, TEXT("PS_Editor: Inserted spline point at index %d"), InsertIdx);
+							UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Inserted spline point at index %d"), InsertIdx);
 							return;
 						}
 					}
@@ -769,22 +828,18 @@ void APS_Editor_Pawn::HandleLeftClickStarted(const FInputActionValue& Value)
 		{
 			if (IPS_Editor_SplineEditable* Spline = Cast<IPS_Editor_SplineEditable>(EdPC3->GetActivePlacementActor()))
 			{
-				// Raycast to get world click position
+				// Project the click ray onto ground. Uses the shared helper so that a click
-				FHitResult AddHit;
+				// pointing at the sky still lands the control point on the ground below the
-				FCollisionQueryParams AddParams;
+				// camera's forward vector (instead of floating 1000 units ahead).
-				AddParams.AddIgnoredActor(this);
+				TArray<AActor*> Ignored;
-				AddParams.AddIgnoredActor(Cast<AActor>(Spline));
+				Ignored.Add(this);
-				const FVector AddEnd = RayOrigin + RayDir * 100000.0f;
+				if (AActor* SplineActor = Cast<AActor>(Spline)) Ignored.Add(SplineActor);
 
-				FVector ClickPos;
+				FVector ClickPos = PS_Editor_GroundSnap::ProjectCameraRayToGround(
-				if (GetWorld()->LineTraceSingleByChannel(AddHit, RayOrigin, AddEnd, ECC_Camera, AddParams))
+					GetWorld(), RayOrigin, RayDir, Ignored);
-				{
+				// Lift the CP slightly above the surface so the tube mesh renders cleanly
-					ClickPos = AddHit.ImpactPoint + FVector(0.0f, 0.0f, 5.0f);
+				// (otherwise Z-fighting with the ground).
-				}
+				ClickPos.Z += 5.0f;
-				else
-				{
-					ClickPos = RayOrigin + RayDir * 1000.0f;
-				}
 
 				TArray<FVector> OldPoints = Spline->GetAllPointLocations();
 				Spline->AddPoint(ClickPos);
@@ -813,7 +868,7 @@ void APS_Editor_Pawn::HandleLeftClickStarted(const FInputActionValue& Value)
 					}
 				}
 
-				UE_LOG(LogTemp, Log, TEXT("PS_Editor: Added spline point at end (index %d)"), NewIdx);
+				UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Added spline point at end (index %d)"), NewIdx);
 				return;
 			}
 		}
@@ -847,6 +902,7 @@ void APS_Editor_Pawn::HandleLeftClickCompleted(const FInputActionValue& Value)
 				if (ActiveSplinePointIndex >= 0 && DraggedSplineActor.IsValid())
 				{
 					TArray<FVector> NewPoints;
+					TArray<FRotator> NewRotations;
 					FString Desc;
 
 					if (IPS_Editor_SplineEditable* SplineActor = Cast<IPS_Editor_SplineEditable>(DraggedSplineActor.Get()))
@@ -857,7 +913,16 @@ void APS_Editor_Pawn::HandleLeftClickCompleted(const FInputActionValue& Value)
 					else if (DraggedSplineActor->GetClass()->ImplementsInterface(UPS_Editor_ChildMovable::StaticClass()))
 					{
 						NewPoints = IPS_Editor_ChildMovable::Execute_GetAllChildLocations(DraggedSplineActor.Get());
-						Desc = TEXT("Move child element");
+						// Snapshot rotations so the undo system restores both translation and rotation.
+						// The arrays may be empty if the BP didn't implement rotation — that's fine,
+						// the undo Execute/Undo only applies when both old and new are non-empty.
+						NewRotations = IPS_Editor_ChildMovable::Execute_GetAllChildRotations(DraggedSplineActor.Get());
+						bool bIsRotate = false;
+						if (UPS_Editor_SelectionManager* SMDesc = EditorPC->GetSelectionManager())
+						{
+							bIsRotate = (SMDesc->GetTransformMode() == EPS_Editor_TransformMode::Rotate);
+						}
+						Desc = bIsRotate ? TEXT("Rotate child element") : TEXT("Move child element");
 					}
 
 					if (NewPoints.Num() > 0)
@@ -866,6 +931,8 @@ void APS_Editor_Pawn::HandleLeftClickCompleted(const FInputActionValue& Value)
 						Action->SplineActor = DraggedSplineActor.Get();
 						Action->OldPoints = SplinePointDragInitialState;
 						Action->NewPoints = NewPoints;
+						Action->OldRotations = SplinePointDragInitialRotations;
+						Action->NewRotations = NewRotations;
 						Action->Description = Desc;
 						UM->RecordAction(Action);
 					}
@@ -992,7 +1059,7 @@ void APS_Editor_Pawn::HandleTranslateMode(const FInputActionValue& Value)
 		if (UPS_Editor_SelectionManager* SM = EditorPC->GetSelectionManager())
 		{
 			SM->SetTransformMode(EPS_Editor_TransformMode::Translate);
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Translate mode"));
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Translate mode"));
 		}
 	}
 }
@@ -1005,7 +1072,7 @@ void APS_Editor_Pawn::HandleRotateMode(const FInputActionValue& Value)
 		if (UPS_Editor_SelectionManager* SM = EditorPC->GetSelectionManager())
 		{
 			SM->SetTransformMode(EPS_Editor_TransformMode::Rotate);
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Rotate mode"));
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Rotate mode"));
 		}
 	}
 }
@@ -1018,11 +1085,17 @@ void APS_Editor_Pawn::HandleScaleMode(const FInputActionValue& Value)
 		if (UPS_Editor_SelectionManager* SM = EditorPC->GetSelectionManager())
 		{
 			SM->SetTransformMode(EPS_Editor_TransformMode::Scale);
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Scale mode"));
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Scale mode"));
 		}
 	}
 }
 
+void APS_Editor_Pawn::ClearActiveSubElementDrag()
+{
+	ActiveSplinePointIndex = -1;
+	DraggedSplineActor = nullptr;
+}
+
 void APS_Editor_Pawn::HandleDelete(const FInputActionValue& Value)
 {
 	if (CameraMode != EPS_Editor_CameraMode::Idle) return;
@@ -1082,7 +1155,7 @@ void APS_Editor_Pawn::HandleDelete(const FInputActionValue& Value)
 				}
 			}
 
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Deleted spline point, %d remaining"), Spline->GetNumPoints());
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Deleted spline point, %d remaining"), Spline->GetNumPoints());
 		}
 		else if (Spline)
 		{
@@ -1094,8 +1167,35 @@ void APS_Editor_Pawn::HandleDelete(const FInputActionValue& Value)
 	UPS_Editor_SelectionManager* SM = EditorPC->GetSelectionManager();
 	if (!SM || !SM->IsAnythingSelected()) return;
 
+	// Filter out mandatory actors (UPS_Editor_SpawnableComponent::bIsMandatory) — they're
+	// pinned to the scene by design and the delete is silently refused for them. We pre-filter
+	// here so the confirmation dialog count matches what will actually be deleted, and we
+	// skip the dialog entirely if nothing is deletable.
+	UPS_Editor_SpawnManager* SpawnManager = EditorPC->GetSpawnManager();
+	TArray<TWeakObjectPtr<AActor>> DeletableActors;
+	int32 SkippedMandatory = 0;
+	for (const TWeakObjectPtr<AActor>& Weak : SM->GetSelectedActors())
+	{
+		AActor* Actor = Weak.Get();
+		if (!Actor) continue;
+		if (SpawnManager && !SpawnManager->IsActorDeletable(Actor))
+		{
+			++SkippedMandatory;
+			UE_LOG(LogTemp, Warning, TEXT("PS_Editor: '%s' is a mandatory actor — delete refused."),
+				*Actor->GetName());
+			continue;
+		}
+		DeletableActors.Add(Weak);
+	}
+
+	if (DeletableActors.Num() == 0)
+	{
+		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Delete aborted — selection contained only mandatory actor(s) (%d)."), SkippedMandatory);
+		return;
+	}
+
 	// Show in-game confirmation dialog (runtime compatible)
-	const int32 Count = SM->GetSelectedActors().Num();
+	const int32 Count = DeletableActors.Num();
 	const FText Message = FText::Format(
 		NSLOCTEXT("PS_Editor", "DeleteConfirm", "Delete {0} selected object(s)?"),
 		FText::AsNumber(Count));
@@ -1108,15 +1208,15 @@ void APS_Editor_Pawn::HandleDelete(const FInputActionValue& Value)
 	// Weak refs to avoid dangling pointers in the callback
 	TWeakObjectPtr<APS_Editor_PlayerController> WeakPC = EditorPC;
 
-	Dialog->Show(Message, FPS_Editor_OnConfirmResult::CreateLambda([WeakPC](bool bConfirmed)
+	Dialog->Show(Message, FPS_Editor_OnConfirmResult::CreateLambda([WeakPC, DeletableActors](bool bConfirmed)
 	{
 		if (!bConfirmed || !WeakPC.IsValid()) return;
 
 		UPS_Editor_SelectionManager* SM = WeakPC->GetSelectionManager();
-		if (!SM || !SM->IsAnythingSelected()) return;
+		if (!SM) return;
 
 		TSharedPtr<FPS_Editor_DeleteAction> Action = MakeShared<FPS_Editor_DeleteAction>();
-		for (const TWeakObjectPtr<AActor>& Weak : SM->GetSelectedActors())
+		for (const TWeakObjectPtr<AActor>& Weak : DeletableActors)
 		{
 			if (AActor* Actor = Weak.Get())
 			{
@@ -1188,11 +1288,6 @@ void APS_Editor_Pawn::HandleSnapToGround(const FInputActionValue& Value)
 
 				if (GetWorld()->LineTraceSingleByChannel(Hit, TraceStart, TraceEnd, ECC_Camera, Params))
 				{
-					UE_LOG(LogTemp, Log, TEXT("PS_Editor: SnapToGround - PointLoc=%s, HitZ=%.2f, HitActor=%s, HitComp=%s"),
-						*PointLoc.ToString(), Hit.ImpactPoint.Z,
-						Hit.GetActor() ? *Hit.GetActor()->GetName() : TEXT("null"),
-						Hit.GetComponent() ? *Hit.GetComponent()->GetName() : TEXT("null"));
-
 					// Store state for undo
 					TArray<FVector> OldPoints = Spline->GetAllPointLocations();
 
@@ -1323,6 +1418,92 @@ void APS_Editor_Pawn::HandleCancel(const FInputActionValue& Value)
 	}
 }
 
+void APS_Editor_Pawn::HandleFocus(const FInputActionValue& Value)
+{
+	// Frame the current selection (Maya/Blender F-key behaviour). Computes the combined
+	// world-space bounding box of every selected actor, then animates the camera to a
+	// distance that fits the box in view while keeping the current viewing direction.
+	APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetController());
+	if (!EditorPC) return;
+
+	UPS_Editor_SelectionManager* SM = EditorPC->GetSelectionManager();
+	if (!SM || !SM->IsAnythingSelected()) return;
+
+	FBox CombinedBox(EForceInit::ForceInit);
+	for (const TWeakObjectPtr<AActor>& Weak : SM->GetSelectedActors())
+	{
+		if (AActor* Actor = Weak.Get())
+		{
+			const FBox ActorBox = Actor->GetComponentsBoundingBox(true);
+			if (ActorBox.IsValid)
+			{
+				CombinedBox += ActorBox;
+			}
+		}
+	}
+	if (!CombinedBox.IsValid)
+	{
+		// Fallback: use actor pivots if no component reports valid bounds (rare — empty actors)
+		for (const TWeakObjectPtr<AActor>& Weak : SM->GetSelectedActors())
+		{
+			if (AActor* Actor = Weak.Get())
+			{
+				CombinedBox += FBox(Actor->GetActorLocation(), Actor->GetActorLocation());
+			}
+		}
+		if (!CombinedBox.IsValid) return;
+	}
+
+	const FVector Center = CombinedBox.GetCenter();
+	const FVector Extent = CombinedBox.GetExtent();
+	// Sphere radius enclosing the box; clamp to a minimum so picking a point-like actor
+	// (zero-size bounds) still leaves the camera at a usable distance.
+	const float Radius = FMath::Max(Extent.Size(), 50.0f);
+
+	// Distance to fit a sphere of given radius given the camera's vertical FOV.
+	float FOV = 90.0f;
+	if (APlayerController* PC = Cast<APlayerController>(GetController()))
+	{
+		if (PC->PlayerCameraManager)
+		{
+			FOV = PC->PlayerCameraManager->GetFOVAngle();
+		}
+	}
+	const float HalfFOVRad = FMath::DegreesToRadians(FOV * 0.5f);
+	const float FitDistance = Radius / FMath::Max(FMath::Tan(HalfFOVRad), 0.01f);
+	const float TargetDistance = FMath::Max(FitDistance * 1.4f, 100.0f); // 40% margin
+
+	// Keep current viewing direction; just slide the camera so Center sits TargetDistance
+	// in front along that direction. Then force the rotation to look squarely at Center —
+	// guards against accumulated rounding so the pivot for the next orbit is exact.
+	const FVector Forward = GetActorForwardVector();
+	FocusStartLocation = GetActorLocation();
+	FocusStartRotation = GetActorRotation();
+	FocusTargetLocation = Center - Forward * TargetDistance;
+	FocusTargetRotation = (Center - FocusTargetLocation).Rotation();
+
+	FocusElapsed = 0.0f;
+	bIsFocusing = true;
+
+	// Update orbit state so Alt+drag immediately after F pivots around the new center.
+	OrbitFocalPoint = Center;
+	OrbitDistance = TargetDistance;
+}
+
+void APS_Editor_Pawn::HandleToggleNavMesh(const FInputActionValue& Value)
+{
+	// Mimics UE editor's P key — toggles the runtime navmesh visualization. We route
+	// through SpawnManager's session-only bShowNavMesh flag so the Settings popup
+	// checkbox stays in sync.
+	APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetController());
+	if (!EditorPC) return;
+	UPS_Editor_SpawnManager* SM = EditorPC->GetSpawnManager();
+	if (!SM) return;
+
+	SM->bShowNavMesh = !SM->bShowNavMesh;
+	PS_Editor_NavUtils::SetNavMeshVisible(GetWorld(), SM->bShowNavMesh);
+}
+
 // ---- Helpers ----
 
 void APS_Editor_Pawn::SetCameraMode(EPS_Editor_CameraMode NewMode)
@@ -1515,6 +1696,7 @@ void APS_Editor_Pawn::BeginGizmoDrag(EPS_Editor_GizmoAxis Axis)
 	}
 
 	// Store initial sub-element state if editing a point/child
+	SplinePointDragInitialRotations.Reset();
 	if (ActiveSplinePointIndex >= 0 && DraggedSplineActor.IsValid())
 	{
 		if (IPS_Editor_SplineEditable* Spline = Cast<IPS_Editor_SplineEditable>(DraggedSplineActor.Get()))
@@ -1524,6 +1706,9 @@ void APS_Editor_Pawn::BeginGizmoDrag(EPS_Editor_GizmoAxis Axis)
 		else if (DraggedSplineActor->GetClass()->ImplementsInterface(UPS_Editor_ChildMovable::StaticClass()))
 		{
 			SplinePointDragInitialState = IPS_Editor_ChildMovable::Execute_GetAllChildLocations(DraggedSplineActor.Get());
+			// Snapshot rotations too so the rotate gizmo can compute deltas from a fixed
+			// reference and the undo system can restore them.
+			SplinePointDragInitialRotations = IPS_Editor_ChildMovable::Execute_GetAllChildRotations(DraggedSplineActor.Get());
 		}
 	}
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_Pawn.h

@@ -11,6 +11,7 @@ class USpringArmComponent;
 class UPostProcessComponent;
 class UInputAction;
 class UInputMappingContext;
+class UMaterialInterface;
 
 DECLARE_DELEGATE_TwoParams(FPS_Editor_OnClick, FVector2D /*ScreenPos*/, bool /*bAdditive*/);
 
@@ -68,6 +69,11 @@ public:
 	/** Currently selected spline point index (-1 = none). Used by UI for Delete Point button. */
 	int32 ActiveSplinePointIndex = -1;
 
+	/** Clear any active sub-element drag state (spline point / ChildMovable index + target actor).
+	 *  Call this when leaving placement / edit mode so a subsequent gizmo drag on the newly
+	 *  selected parent actor moves the whole actor instead of the last clicked point. */
+	void ClearActiveSubElementDrag();
+
 protected:
 	virtual void BeginPlay() override;
 
@@ -85,6 +91,12 @@ protected:
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Camera")
 	TObjectPtr<UPostProcessComponent> OutlinePostProcess;
 
+	/** Selection outline post-process material (from /PS_Editor/M_PS_Editor_SelectionOutline).
+	 *  Hard-ref so the cooker picks it up in packaged builds. Resolved via ConstructorHelpers
+	 *  in the ctor. */
+	UPROPERTY()
+	TObjectPtr<UMaterialInterface> OutlineMaterial;
+
 	// ---- Camera Settings ----
 
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Camera|Fly")
@@ -197,9 +209,18 @@ private:
 	UPROPERTY()
 	TObjectPtr<UInputAction> IA_Cancel;
 
-	// ---- Spline point drag state ----
+	UPROPERTY()
+	TObjectPtr<UInputAction> IA_Focus;
+
+	UPROPERTY()
+	TObjectPtr<UInputAction> IA_ToggleNavMesh;
+
+	// ---- Spline point / ChildMovable drag state ----
 	TWeakObjectPtr<AActor> DraggedSplineActor;
 	TArray<FVector> SplinePointDragInitialState;
+	// Initial rotations captured at drag start when dragging a ChildMovable sub-element.
+	// Empty for spline points (which do not have a rotation concept).
+	TArray<FRotator> SplinePointDragInitialRotations;
 	FVector SplinePointDragPlaneOrigin;
 	FVector SplinePointDragPlaneNormal;
 
@@ -241,6 +262,17 @@ private:
 	void HandleSplineMode(const FInputActionValue& Value);
 	void HandleConfirm(const FInputActionValue& Value);
 	void HandleCancel(const FInputActionValue& Value);
+	void HandleFocus(const FInputActionValue& Value);
+	void HandleToggleNavMesh(const FInputActionValue& Value);
+
+	// ---- Focus animation state (F key, frame selection) ----
+	bool bIsFocusing = false;
+	float FocusElapsed = 0.0f;
+	float FocusDuration = 0.25f;
+	FVector FocusStartLocation = FVector::ZeroVector;
+	FVector FocusTargetLocation = FVector::ZeroVector;
+	FRotator FocusStartRotation = FRotator::ZeroRotator;
+	FRotator FocusTargetRotation = FRotator::ZeroRotator;
 
 	// ---- Helpers ----
 	void CreateInputActions();

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_PlayerController.cpp

@@ -10,6 +10,8 @@
 #include "PS_Editor_SplineEditable.h"
 #include "PS_Editor_PointPlaceable.h"
 #include "PS_Editor_EditableInterface.h"
+#include "PS_Editor_EditableComponent.h"
+#include "PS_Editor_TimelineSubsystem.h"
 #include "Engine/LevelStreamingDynamic.h"
 #include "GameFramework/Character.h"
 #include "GameFramework/CharacterMovementComponent.h"
@@ -29,6 +31,44 @@
 #include "GameFramework/GameStateBase.h"
 #include "GameFramework/PlayerState.h"
 
+namespace
+{
+	/** Resolve an editable property path ("Comp.Prop" or "Prop") on Actor to a UObject target +
+	 *  FProperty pointer. Mirrors PS_Editor_MainWidget::FindPropertyTarget + class lookup so the
+	 *  PlayerController can snapshot/restore values without depending on the widget. */
+	static bool ResolveEditableProp(AActor* Actor, const FName& Path, UObject*& OutTarget, FProperty*& OutProp)
+	{
+		OutTarget = nullptr;
+		OutProp = nullptr;
+		if (!Actor) return false;
+
+		FString CompName, PropName;
+		UPS_Editor_EditableComponent::ParsePropertyPath(Path, CompName, PropName);
+
+		if (CompName.IsEmpty())
+		{
+			OutTarget = Actor;
+		}
+		else
+		{
+			TArray<UActorComponent*> Components;
+			Actor->GetComponents(Components);
+			for (UActorComponent* Comp : Components)
+			{
+				if (Comp && Comp->GetName() == CompName)
+				{
+					OutTarget = Comp;
+					break;
+				}
+			}
+		}
+
+		if (!OutTarget) return false;
+		OutProp = OutTarget->GetClass()->FindPropertyByName(*PropName);
+		return OutProp != nullptr;
+	}
+}
+
 APS_Editor_PlayerController::APS_Editor_PlayerController()
 {
 	bShowMouseCursor = true;
@@ -98,8 +138,8 @@ void APS_Editor_PlayerController::BeginPlay()
 
 					if (!Sub->PendingScenarioName.IsEmpty() && SpawnManager && SceneSerializer)
 					{
-						bool bLoaded = SceneSerializer->LoadScene(Sub->PendingScenarioName, SpawnManager);
+						bool bLoaded = SceneSerializer->LoadScenario(Sub->PendingScenarioName, SpawnManager);
-						UE_LOG(LogTemp, Log, TEXT("PS_Editor: LoadScene('%s') = %s"),
+						UE_LOG(LogTemp, Log, TEXT("PS_Editor: LoadScenario('%s') = %s"),
 							*Sub->PendingScenarioName, bLoaded ? TEXT("OK") : TEXT("FAILED"));
 					}
 					Sub->PendingScenarioName.Empty();
@@ -170,6 +210,20 @@ void APS_Editor_PlayerController::BeginPlay()
 	});
 }
 
+void APS_Editor_PlayerController::EndPlay(const EEndPlayReason::Type EndPlayReason)
+{
+	// Reset the runtime-editor flag whenever this controller's world tears down — covers
+	// OpenLevel from any caller (Play button, scenario loader BP, gameplay code that calls
+	// OpenLevel directly), end of PIE, and seamless world transitions. Without this, the
+	// static would stay 'true' from the previous editor session and IsInEditorMode() would
+	// lie in the next world (which has no PS_Editor PlayerController). The 3 existing eager
+	// resets (CloseEditor + Play buttons) remain as defense-in-depth so any check between
+	// the click and the actual world tear-down also returns false.
+	UPS_Editor_SceneLoader::bIsEditorModeActive = false;
+
+	Super::EndPlay(EndPlayReason);
+}
+
 void APS_Editor_PlayerController::Tick(float DeltaTime)
 {
 	Super::Tick(DeltaTime);
@@ -186,6 +240,17 @@ void APS_Editor_PlayerController::Tick(float DeltaTime)
 	{
 		SpawnManager->TickEditorMode(DeltaTime);
 	}
+
+	// Keep the gizmo glued to its selection every frame while simulating — otherwise
+	// animated actors (AI walking, timeline-driven properties, ragdoll) leave the gizmo
+	// behind at the pose it had when the actor was last selected / dragged. Outside of
+	// simulation the selection doesn't move on its own so the normal mutation-driven
+	// UpdateGizmo calls (click / drag / undo) are enough — and skipping this avoids any
+	// feedback with the pawn's in-progress gizmo drag.
+	if (bSimulating && SelectionManager && SelectionManager->IsAnythingSelected())
+	{
+		SelectionManager->UpdateGizmo();
+	}
 }
 
 void APS_Editor_PlayerController::OnPossess(APawn* InPawn)
@@ -264,6 +329,43 @@ void APS_Editor_PlayerController::StartSimulation()
 		}
 	}
 
+	// Snapshot editable property values so we can restore them on Stop. Game logic may mutate
+	// editable properties during simulate (e.g. WalkSpeed driven by gameplay code) — restoring
+	// on Stop matches the convention used for transforms. Skip properties already tracked by the
+	// timeline: the timeline's RestoreBaseline owns those, double-restoring would conflict.
+	SimulationSavedEditableProps.Empty();
+	UPS_Editor_TimelineSubsystem* TimelineSS = GetWorld() ? GetWorld()->GetSubsystem<UPS_Editor_TimelineSubsystem>() : nullptr;
+	if (SpawnManager)
+	{
+		for (const TWeakObjectPtr<AActor>& Weak : SpawnManager->GetSpawnedActors())
+		{
+			AActor* Actor = Weak.Get();
+			if (!Actor) continue;
+			UPS_Editor_EditableComponent* EditComp = Actor->FindComponentByClass<UPS_Editor_EditableComponent>();
+			if (!EditComp || EditComp->EditableProperties.Num() == 0) continue;
+
+			TMap<FName, FString> ActorMap;
+			for (const FPS_Editor_EditablePropertyEntry& Entry : EditComp->EditableProperties)
+			{
+				if (TimelineSS && TimelineSS->IsPropertyTracked(Actor, Entry.Path))
+				{
+					continue; // timeline owns this one
+				}
+				UObject* Target = nullptr;
+				FProperty* Prop = nullptr;
+				if (!ResolveEditableProp(Actor, Entry.Path, Target, Prop)) continue;
+
+				FString Exported;
+				Prop->ExportText_InContainer(0, Exported, Target, Target, nullptr, PPF_None);
+				ActorMap.Add(Entry.Path, Exported);
+			}
+			if (ActorMap.Num() > 0)
+			{
+				SimulationSavedEditableProps.Add(Actor, MoveTemp(ActorMap));
+			}
+		}
+	}
+
 	// Clear selection
 	if (SelectionManager)
 	{
@@ -378,18 +480,23 @@ void APS_Editor_PlayerController::SetSimulationPaused(bool bPaused)
 	}
 }
 
-void APS_Editor_PlayerController::RequestStopSimulation()
+void APS_Editor_PlayerController::RequestStopSimulation(bool bImmediate)
 {
 	if (!bSimulating) return;
 
 	// If a request is already scheduled, do nothing (debounce double-clicks on Stop).
+	// Skip the debounce when bImmediate (Restart wants to flush right now).
+	if (!bImmediate)
+	{
 		if (UWorld* World = GetWorld())
 		{
 			if (PendingStopSimulationHandle.IsValid()) return;
 		}
+	}
 
 	// Fire OnEditorBeforeSimulateStop immediately on every actor so BP handlers can react
-	// while the BT is still live. Then schedule the real cut for ~500ms later.
+	// while the BT is still live. Then schedule the real cut (deferred) or run it now
+	// (immediate, used by timeline Restart).
 	if (SpawnManager)
 	{
 		for (const TWeakObjectPtr<AActor>& Weak : SpawnManager->GetSpawnedActors())
@@ -402,6 +509,21 @@ void APS_Editor_PlayerController::RequestStopSimulation()
 		}
 	}
 
+	if (bImmediate)
+	{
+		// Cancel any pending deferred stop so it doesn't fire again later.
+		if (UWorld* World = GetWorld())
+		{
+			if (PendingStopSimulationHandle.IsValid())
+			{
+				World->GetTimerManager().ClearTimer(PendingStopSimulationHandle);
+				PendingStopSimulationHandle.Invalidate();
+			}
+		}
+		StopSimulation();
+		return;
+	}
+
 	if (UWorld* World = GetWorld())
 	{
 		TWeakObjectPtr<APS_Editor_PlayerController> WeakThis(this);
@@ -491,7 +613,49 @@ void APS_Editor_PlayerController::StopSimulation()
 	}
 	SimulationSavedTransforms.Empty();
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Simulation stopped, transforms restored"));
+	// Restore editable properties that game logic may have mutated during simulate. The timeline's
+	// own RestoreBaseline already covers the animated ones (we skipped them at snapshot time), so
+	// this loop only touches properties NOT owned by the timeline — no double-write. Mirrors the
+	// canonical UI write path (ImportText + MarkRenderStateDirty + RepNotify + OnEditorPropertyChanged)
+	// so actors reinit consistently regardless of where the value change originated.
+	int32 RestoredCount = 0;
+	for (auto& ActorPair : SimulationSavedEditableProps)
+	{
+		AActor* Actor = ActorPair.Key.Get();
+		if (!Actor) continue;
+		const bool bImplementsInterface = Actor->GetClass()->ImplementsInterface(UPS_Editor_EditableInterface::StaticClass());
+		for (auto& PropPair : ActorPair.Value)
+		{
+			UObject* Target = nullptr;
+			FProperty* Prop = nullptr;
+			if (!ResolveEditableProp(Actor, PropPair.Key, Target, Prop)) continue;
+
+			Prop->ImportText_InContainer(*PropPair.Value, Target, Target, PPF_None);
+
+			if (UActorComponent* Comp = Cast<UActorComponent>(Target))
+			{
+				Comp->MarkRenderStateDirty();
+			}
+
+			// RepNotify mirror — ImportText bypasses it, same as the UI write path.
+			if (!Prop->RepNotifyFunc.IsNone())
+			{
+				if (UFunction* RepFunc = Target->FindFunction(Prop->RepNotifyFunc))
+				{
+					Target->ProcessEvent(RepFunc, nullptr);
+				}
+			}
+
+			if (bImplementsInterface)
+			{
+				IPS_Editor_EditableInterface::Execute_OnEditorPropertyChanged(Actor, PropPair.Key.ToString());
+			}
+			++RestoredCount;
+		}
+	}
+	SimulationSavedEditableProps.Empty();
+
+	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Simulation stopped, transforms restored (%d editable properties also restored)"), RestoredCount);
 }
 
 void APS_Editor_PlayerController::BeginPointPlacement(TSubclassOf<AActor> InActorClass)
@@ -505,7 +669,7 @@ void APS_Editor_PlayerController::BeginPointPlacement(TSubclassOf<AActor> InActo
 	bAppendingToActor = false;
 	AppendInitialPoints.Empty();
 	EditorMode = EPS_Editor_EditorMode::SplinePlacement;
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Point placement mode started (class: %s)"), *PlacementActorClass->GetName());
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Point placement mode started (class: %s)"), *PlacementActorClass->GetName());
 }
 
 void APS_Editor_PlayerController::BeginPointPlacementAppend(AActor* ExistingActor)
@@ -532,7 +696,7 @@ void APS_Editor_PlayerController::BeginPointPlacementAppend(AActor* ExistingActo
 		IPS_Editor_ChildMovable::Execute_SetChildHandlesVisible(ExistingActor, true);
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Editing sub-elements of %s"), *ExistingActor->GetName());
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Editing sub-elements of %s"), *ExistingActor->GetName());
 }
 
 void APS_Editor_PlayerController::FinishPointPlacement()
@@ -554,13 +718,21 @@ void APS_Editor_PlayerController::FinishPointPlacement()
 		IPS_Editor_ChildMovable::Execute_ClearChildHighlight(PlacementActor);
 	}
 
+	// Clear the pawn's sub-element drag state (last clicked spline point / child index).
+	// Without this, grabbing the gizmo right after Done would move the last clicked point
+	// instead of the whole actor, because the drag logic keys on ActiveSplinePointIndex.
+	if (APS_Editor_Pawn* EditorPawn = Cast<APS_Editor_Pawn>(GetPawn()))
+	{
+		EditorPawn->ClearActiveSubElementDrag();
+	}
+
 	if (PlacementActor && SelectionManager)
 	{
 		SelectionManager->ClearSelection();
 		SelectionManager->SelectActor(PlacementActor);
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Exited placement mode"));
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Exited placement mode"));
 	bAppendingToActor = false;
 	AppendInitialPoints.Empty();
 	EditorMode = EPS_Editor_EditorMode::Normal;
@@ -601,7 +773,7 @@ void APS_Editor_PlayerController::LoadBaseLevelAsSublevel(const FString& LevelNa
 		CurrentSublevel->SetShouldBeVisible(false);
 		CurrentSublevel->SetIsRequestingUnloadAndRemoval(true);
 		CurrentSublevel = nullptr;
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Unloaded previous sublevel"));
+		UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Unloaded previous sublevel"));
 	}
 
 	// Rebuild spawn catalog: global + base-level-specific catalogs
@@ -721,7 +893,7 @@ void APS_Editor_PlayerController::LoadBaseLevelAsSublevel(const FString& LevelNa
 				ExtraSublevel->SetShouldBeLoaded(true);
 				ExtraSublevel->SetShouldBeVisible(true);
 				AdditionalSublevels.Add(ExtraSublevel);
-				UE_LOG(LogTemp, Log, TEXT("PS_Editor: Loaded additional sublevel '%s'"), *ExtraPath);
+				UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Loaded additional sublevel '%s'"), *ExtraPath);
 			}
 			else
 			{
@@ -769,7 +941,7 @@ void APS_Editor_PlayerController::DisableSublevelPostProcessMaterials()
 				Actor->MarkComponentsRenderStateDirty();
 			}
 		}
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Deferred lightmap refresh on sublevel"));
+		UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Deferred lightmap refresh on sublevel"));
 	}, 0.5f, false);
 
 	APS_Editor_CameraStart* CameraStart = nullptr;
@@ -782,7 +954,7 @@ void APS_Editor_PlayerController::DisableSublevelPostProcessMaterials()
 		if (APostProcessVolume* PPVolume = Cast<APostProcessVolume>(Actor))
 		{
 			PPVolume->Settings.WeightedBlendables.Array.Empty();
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Disabled PP materials on '%s'"), *PPVolume->GetName());
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Disabled PP materials on '%s'"), *PPVolume->GetName());
 		}
 
 		// Find camera start marker
@@ -800,11 +972,21 @@ void APS_Editor_PlayerController::DisableSublevelPostProcessMaterials()
 			const FRotator YawOnly(CameraStart->GetActorRotation().Pitch, CameraStart->GetActorRotation().Yaw, 0.0f);
 			MyPawn->SetActorLocationAndRotation(CameraStart->GetActorLocation(), YawOnly);
 			SetControlRotation(YawOnly);
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Camera moved to CameraStart at %s"),
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Camera moved to CameraStart at %s"),
 				*CameraStart->GetActorLocation().ToString());
 		}
 	}
 
+	// Auto-spawn mandatory actors now that the baseLevel is loaded and visible. This covers:
+	//   - Initial editor startup (default baseLevel loads at BeginPlay)
+	//   - User switching baseLevel via the UI
+	// Idempotent — already-present mandatory instances are skipped. The catalog was rebuilt
+	// just before LoadLevelInstance so its bIsMandatory cache is fresh.
+	if (SpawnManager)
+	{
+		SpawnManager->EnsureMandatoryActorsPresent();
+	}
+
 	// Delay 2s then fade in from black over 2 seconds
 	if (bWaitingForSublevelFadeIn)
 	{
@@ -909,7 +1091,7 @@ void APS_Editor_PlayerController::HandleEditorClick(FVector2D ScreenPos, bool bA
 					{
 						const int32 InsertIdx = Spline->FindInsertIndex(TubeHit.ImpactPoint);
 						Spline->InsertPoint(InsertIdx, TubeHit.ImpactPoint + FVector(0.0f, 0.0f, 5.0f));
-						UE_LOG(LogTemp, Log, TEXT("PS_Editor: Inserted point at index %d during placement"), InsertIdx);
+						UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Inserted point at index %d during placement"), InsertIdx);
 						return;
 					}
 				}

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_PlayerController.h

@@ -30,58 +30,63 @@ class PS_EDITOR_API APS_Editor_PlayerController : public APlayerController
 public:
 	APS_Editor_PlayerController();
 
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	UPS_Editor_SelectionManager* GetSelectionManager() const { return SelectionManager; }
 
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	UPS_Editor_UndoManager* GetUndoManager() const { return UndoManager; }
 
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	UPS_Editor_SpawnManager* GetSpawnManager() const { return SpawnManager; }
 
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	UPS_Editor_SceneSerializer* GetSceneSerializer() const { return SceneSerializer; }
 
 	/** Master catalog grouping all sub-catalogs (Tools, Characters, Props...). */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	TObjectPtr<UPS_Editor_MasterCatalog> MasterCatalogAsset;
 
 	/** Current base level for scene save/load filtering. Auto-detected at startup, switchable via UI. */
-	UPROPERTY(BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(BlueprintReadWrite, Category = "PS_Editor")
 	FString CurrentBaseLevel;
 
 	/** Fired when the editor Close button is pressed (after optional save).
 	 *  Bind this in Blueprint to override the default behavior (quit application).
 	 *  If nothing is bound, the application exits. */
-	UPROPERTY(BlueprintAssignable, Category = "ASTERION|PS_Editor")
+	UPROPERTY(BlueprintAssignable, Category = "PS_Editor")
 	FOnEditorClosed OnEditorClosed;
 
 	/** Call to close the editor. Broadcasts OnEditorClosed; if unbound, quits the app. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void CloseEditor();
 
 	// ---- Simulate Mode ----
 
 	/** Start simulation: enable AI, store actor positions, disable saving.
 	 *  Cancels any in-flight deferred RequestStopSimulation. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void StartSimulation();
 
 	/** Stop simulation: disable AI, restore actor positions, re-enable saving.
 	 *  Synchronous — fires OnEditorSimulateStop and cuts AI immediately. Callers that want
 	 *  a BT grace period (with OnEditorBeforeSimulateStop) should use RequestStopSimulation. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void StopSimulation();
 
 	/** Request a deferred stop: fires OnEditorBeforeSimulateStop immediately, then schedules
 	 *  the real StopSimulation after a grace period (500ms by default) so BT has time to
 	 *  react to whatever the BP handler does in OnEditorBeforeSimulateStop.
-	 *  Timeline Stop and the Simulate toolbar button both go through this. */
+	 *  Timeline Stop and the Simulate toolbar button both go through this.
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	 *
-	void RequestStopSimulation();
+	 *  @param bImmediate  If true, fire OnEditorBeforeSimulateStop and run StopSimulation
+	 *                     synchronously in the same call (no grace period). Used by
+	 *                     timeline Restart, where we want transforms restored before the
+	 *                     subsequent Play(). Defaults to false (deferred). */
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
+	void RequestStopSimulation(bool bImmediate = false);
 
 	/** True while simulation is running. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	bool IsSimulating() const { return bSimulating; }
 
 	/**
@@ -89,7 +94,7 @@ public:
 	 * saved-transforms state. Used by the timeline's Pause so the characters freeze
 	 * in place instead of snapping back to their pre-play positions.
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void SetSimulationPaused(bool bPaused);
 
 	/** Load a base level as sublevel for visual context. Unloads previous sublevel.
@@ -98,7 +103,7 @@ public:
 	 *                             If empty, LevelName is used as-is (legacy behavior).
 	 *  @param ExtraSublevels      Additional sublevels to load alongside (e.g. always-loaded streaming levels).
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void LoadBaseLevelAsSublevel(const FString& LevelName, const FString& MapPath, const TArray<FString>& ExtraSublevels);
 
 	/** Overload without extra sublevels. */
@@ -106,7 +111,7 @@ public:
 
 	// ---- Editor Mode (Normal / SplinePlacement) ----
 
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	EPS_Editor_EditorMode GetEditorMode() const { return EditorMode; }
 
 	/** Enter point-placement mode for any actor implementing IPS_Editor_PointPlaceable. */
@@ -138,6 +143,7 @@ public:
 
 protected:
 	virtual void BeginPlay() override;
+	virtual void EndPlay(const EEndPlayReason::Type EndPlayReason) override;
 	virtual void Tick(float DeltaTime) override;
 	virtual void OnPossess(APawn* InPawn) override;
 
@@ -175,6 +181,12 @@ private:
 	/** Saved transforms for all spawned actors before simulation, to restore on stop. */
 	TMap<TWeakObjectPtr<AActor>, FTransform> SimulationSavedTransforms;
 
+	/** Saved exported-text values for editable properties (UPS_Editor_EditableComponent::EditableProperties)
+	 *  that aren't already managed by the timeline. Game logic may mutate these during simulate;
+	 *  StopSimulation restores them so the editor returns to the pre-Play state for ALL editable
+	 *  properties, animated or not. Map: Actor -> { PropertyPath -> ExportedTextValue }. */
+	TMap<TWeakObjectPtr<AActor>, TMap<FName, FString>> SimulationSavedEditableProps;
+
 	/** Timer handle for the deferred StopSimulation used by RequestStopSimulation. */
 	FTimerHandle PendingStopSimulationHandle;
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/Gizmo/PS_Editor_Gizmo.cpp

@@ -26,6 +26,15 @@ APS_Editor_Gizmo::APS_Editor_Gizmo()
 {
 	PrimaryActorTick.bCanEverTick = true;
 
+	// Hard-ref the gizmo base material at CDO-construction time so the cooker follows it
+	// into packaged builds. Replaces the old runtime LoadObject<> soft-string path.
+	static ConstructorHelpers::FObjectFinder<UMaterialInterface> GizmoBaseMatFinder(
+		TEXT("/PS_Editor/M_PS_Editor_Gizmo.M_PS_Editor_Gizmo"));
+	if (GizmoBaseMatFinder.Succeeded())
+	{
+		GizmoBaseMaterial = GizmoBaseMatFinder.Object;
+	}
+
 	GizmoRoot = CreateDefaultSubobject<USceneComponent>(TEXT("GizmoRoot"));
 	SetRootComponent(GizmoRoot);
 
@@ -92,9 +101,8 @@ void APS_Editor_Gizmo::BeginPlay()
 {
 	Super::BeginPlay();
 
-	// Load gizmo material
+	// GizmoBaseMaterial is resolved in the ctor via ConstructorHelpers (hard cook ref).
-	UMaterialInterface* GizmoBaseMat = LoadObject<UMaterialInterface>(
+	UMaterialInterface* GizmoBaseMat = GizmoBaseMaterial.Get();
-		nullptr, TEXT("/PS_Editor/M_PS_Editor_Gizmo.M_PS_Editor_Gizmo"));
 
 	auto MakeColorMat = [&](const FLinearColor& Color) -> UMaterialInstanceDynamic*
 	{

Unreal/Plugins/PS_Editor/Source/PS_Editor/Gizmo/PS_Editor_Gizmo.h

@@ -8,6 +8,7 @@
 class UStaticMeshComponent;
 class UProceduralMeshComponent;
 class UMaterialInstanceDynamic;
+class UMaterialInterface;
 
 /**
  * Custom runtime transform gizmo for PS_Editor.
@@ -109,6 +110,12 @@ private:
 	TObjectPtr<UStaticMeshComponent> ScaleCube_Center;
 
 	// ---- Materials ----
+
+	/** Base gizmo material (from /PS_Editor/M_PS_Editor_Gizmo). Hard-ref so the cooker
+	 *  picks it up in packaged builds. Resolved via ConstructorHelpers in the ctor. */
+	UPROPERTY()
+	TObjectPtr<UMaterialInterface> GizmoBaseMaterial;
+
 	UPROPERTY()
 	TObjectPtr<UMaterialInstanceDynamic> Mat_X;
 	UPROPERTY()

Unreal/Plugins/PS_Editor/Source/PS_Editor/PS_Editor.Build.cs

@@ -33,7 +33,8 @@ public class PS_Editor : ModuleRules
 			"JsonUtilities",
 			"ProceduralMeshComponent",
 			"DesktopPlatform",
-			"AIModule"
+			"AIModule",
+			"NavigationSystem"
 		});
 
 		PrivateDependencyModuleNames.AddRange(new string[]

Unreal/Plugins/PS_Editor/Source/PS_Editor/Selection/PS_Editor_GroundSnap.cpp

@@ -0,0 +1,206 @@
+#include "PS_Editor_GroundSnap.h"
+#include "PS_Editor_SpawnableComponent.h"
+#include "Engine/World.h"
+#include "GameFramework/Actor.h"
+#include "CollisionQueryParams.h"
+
+namespace PS_Editor_GroundSnap
+{
+	// Normal.Z threshold that classifies a hit surface as "floor-like" (roughly walkable
+	// slope — cos(72°) ≈ 0.3). Below this, we treat the surface as a wall / ceiling /
+	// overhang and keep searching.
+	static constexpr float GFloorNormalThreshold = 0.3f;
+
+	/** Single downward trace that returns the first floor-like hit. Returns false if
+	 *  nothing below qualifies (all walls, ceiling-like geometry, etc.). */
+	static bool FindFloorBelow(UWorld* World, const FVector& Above, float Distance,
+		const FCollisionQueryParams& Params, FVector& OutImpact)
+	{
+		TArray<FHitResult> Hits;
+		if (!World->LineTraceMultiByChannel(Hits, Above, Above - FVector::UpVector * Distance,
+			ECC_Visibility, Params))
+		{
+			return false;
+		}
+		for (const FHitResult& H : Hits)
+		{
+			if (H.ImpactNormal.Z >= GFloorNormalThreshold)
+			{
+				OutImpact = H.ImpactPoint;
+				return true;
+			}
+		}
+		return false;
+	}
+
+	FVector ProjectCameraRayToGround(UWorld* World,
+		const FVector& Start,
+		const FVector& Direction,
+		const TArray<AActor*>& IgnoreActors,
+		float MaxCameraDistance,
+		float DefaultDistance,
+		float DownTraceDistance)
+	{
+		if (!World)
+		{
+			return Start + Direction * DefaultDistance;
+		}
+
+		FCollisionQueryParams Params(SCENE_QUERY_STAT(PS_Editor_GroundSnap), false);
+		for (AActor* A : IgnoreActors)
+		{
+			if (A) Params.AddIgnoredActor(A);
+		}
+
+		// 1) Primary camera-aligned trace.
+		FHitResult Hit;
+		if (World->LineTraceSingleByChannel(Hit, Start,
+			Start + Direction.GetSafeNormal() * MaxCameraDistance,
+			ECC_Visibility, Params))
+		{
+			const float NormalZ = Hit.ImpactNormal.Z;
+
+			// Ceiling / overhang: normal points DOWN. Re-cast downward from a point just
+			// BELOW the ceiling impact (not on the surface itself — avoids re-hitting the
+			// backface due to floating-point slop).
+			if (NormalZ <= -0.3f)
+			{
+				const FVector StartBelowCeiling = Hit.ImpactPoint - FVector::UpVector * 2.0f;
+				FVector FloorImpact;
+				if (FindFloorBelow(World, StartBelowCeiling, DownTraceDistance, Params, FloorImpact))
+				{
+					return FloorImpact;
+				}
+				return Hit.ImpactPoint;
+			}
+
+			// Wall: roughly horizontal normal. Step BACK along the wall normal (away from
+			// the surface) by a small distance so the placed object doesn't end up with its
+			// bbox half-buried in the wall, then cast down to find the floor at the foot
+			// of the wall. Without this, clicking on a wall drops the object inside it.
+			if (NormalZ < 0.3f) // not floor-like either
+			{
+				constexpr float WallStandoff = 30.0f;
+				const FVector StartAwayFromWall = Hit.ImpactPoint + Hit.ImpactNormal * WallStandoff;
+				FVector FloorImpact;
+				if (FindFloorBelow(World, StartAwayFromWall, DownTraceDistance, Params, FloorImpact))
+				{
+					return FloorImpact;
+				}
+				// No floor below — at least return the stood-off point so we're not inside
+				// the wall.
+				return StartAwayFromWall;
+			}
+
+			// Floor-like: use impact directly.
+			return Hit.ImpactPoint;
+		}
+
+		// 2) Camera missed. Aim DOWN from a fallback point in front of the camera so the
+		//    object still lands on ground instead of hovering in the sky.
+		const FVector FallbackTarget = Start + Direction.GetSafeNormal() * DefaultDistance;
+		FVector FloorImpact;
+		if (FindFloorBelow(World, FallbackTarget, DownTraceDistance, Params, FloorImpact))
+		{
+			return FloorImpact;
+		}
+
+		// 3) Nothing at all — give up and return the in-front point.
+		return FallbackTarget;
+	}
+
+	bool SnapActorToGround(AActor* Actor,
+		FVector& OutLocation,
+		float OverheadRaise,
+		float MaxDistance,
+		const TArray<AActor*>& ExtraIgnored)
+	{
+		if (!Actor || !Actor->GetWorld())
+		{
+			return false;
+		}
+
+		// Measure the bbox bottom relative to the pivot.
+		//
+		// Primary path — colliding components only: a Character's capsule drives the
+		// calculation, ignoring the skeletal mesh (often with collision disabled) or any
+		// attached weapons / child actors whose meshes might extend below the capsule and
+		// artificially lift the pawn by that overflow. Formula: pivot is placed so the
+		// collision-bbox bottom rests on the ground.
+		//
+		// Fallback — no colliding components found: the actor is treated as a pure visual
+		// marker (VR start zone, placement helper, or a BP that enables collision only
+		// when entering editor mode and hasn't done so yet). For these, we don't trust
+		// the full-bounds bbox (it may wrap helper meshes far below the pivot and push
+		// the object absurdly high). Instead we anchor the PIVOT directly on the ground —
+		// which is what the designer authored the pivot for on these markers.
+		FVector BoundsOrigin, BoundsExtent;
+		Actor->GetActorBounds(/*bOnlyCollidingComponents*/ true, BoundsOrigin, BoundsExtent);
+		const bool bUsedFallback = BoundsExtent.IsNearlyZero();
+		if (bUsedFallback)
+		{
+			// Read the full bounds too — only to know where "above the actor" is for the
+			// ray start position, not to anchor the snap.
+			Actor->GetActorBounds(false, BoundsOrigin, BoundsExtent);
+		}
+		const float ActorZ = Actor->GetActorLocation().Z;
+		const float BBoxBottomZ = BoundsOrigin.Z - BoundsExtent.Z;
+		const float BBoxTopZ = BoundsOrigin.Z + BoundsExtent.Z;
+		const float PivotAboveBottom = bUsedFallback ? 0.0f : (ActorZ - BBoxBottomZ);
+
+		float ExtraOffset = 0.0f;
+		if (UPS_Editor_SpawnableComponent* SpawnComp = Actor->FindComponentByClass<UPS_Editor_SpawnableComponent>())
+		{
+			ExtraOffset = SpawnComp->GroundOffset;
+		}
+
+		// Start INSIDE the actor (at its pivot + a small buffer), not above its bbox top.
+		// Why: if we started above the bbox top and the actor was raised even slightly into
+		// a ceiling, the ray would cross the ceiling and the FIRST floor-like hit (filtered
+		// by normal.Z >= 0.3) would be the CEILING'S TOP FACE — i.e. the floor of the
+		// upper story. That made "End" teleport the actor up to the next story when the
+		// user only nudged it a bit too high.
+		//
+		// Starting at the pivot keeps the ray origin within the actor's own volume (pivot
+		// is always inside or at the edge of the bbox for normal meshes / characters). The
+		// actor is in the ignore list, so the trace passes straight through its own body
+		// and finds the first floor-like surface UNDERNEATH the actor — i.e. the floor of
+		// its current room.
+		//
+		// OverheadRaise is unused now (kept for API compat); the 2.0f buffer just avoids
+		// a degenerate "ray starts exactly on ground surface" edge case when the pivot
+		// coincides with the ground.
+		(void)BBoxTopZ; (void)OverheadRaise;
+		const FVector Start = Actor->GetActorLocation() + FVector(0.f, 0.f, 2.0f);
+		const FVector End = Start - FVector::UpVector * MaxDistance;
+
+		FCollisionQueryParams Params(SCENE_QUERY_STAT(PS_Editor_SnapActorToGround), false);
+		Params.AddIgnoredActor(Actor);
+		for (AActor* A : ExtraIgnored)
+		{
+			if (A) Params.AddIgnoredActor(A);
+		}
+
+		// Multi-hit trace + filter by normal so we only snap to floor-like surfaces.
+		// Accepts slopes up to ~72 degrees (normal.Z > 0.3). Rejects walls, ceilings,
+		// overhangs, and any backface we might cross on the way down.
+		TArray<FHitResult> Hits;
+		if (!Actor->GetWorld()->LineTraceMultiByChannel(Hits, Start, End, ECC_Visibility, Params))
+		{
+			return false;
+		}
+
+		constexpr float FloorNormalThreshold = 0.3f; // cos(~72 deg)
+		for (const FHitResult& H : Hits)
+		{
+			if (H.ImpactNormal.Z >= FloorNormalThreshold)
+			{
+				OutLocation = Actor->GetActorLocation();
+				OutLocation.Z = H.ImpactPoint.Z + PivotAboveBottom + ExtraOffset;
+				return true;
+			}
+		}
+		// Trace hit stuff but nothing floor-like — don't move the actor.
+		return false;
+	}
+}

Unreal/Plugins/PS_Editor/Source/PS_Editor/Selection/PS_Editor_GroundSnap.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "CoreMinimal.h"
+
+class AActor;
+class UWorld;
+
+/**
+ * Ground-placement helpers used across catalogue spawn, End-key snap, and spline point
+ * placement. The goal is that every object the user drops / snaps ends up on the ground
+ * by default, even when the camera is pointing at the sky.
+ */
+namespace PS_Editor_GroundSnap
+{
+	/**
+	 * Project a camera-style ray onto ground.
+	 *
+	 * Sequence:
+	 *   1. Line-trace from Start along Direction for up to MaxCameraDistance.
+	 *      - Hit a surface whose normal points UP / sideways -> return ImpactPoint.
+	 *      - Hit a surface whose normal points DOWN (ceiling, overhang) -> re-cast straight
+	 *        down from the impact point so the object lands on the floor underneath the
+	 *        overhead surface instead of glued to the ceiling.
+	 *   2. Camera ray missed entirely (user aiming at the sky). Fall back to a point at
+	 *      DefaultDistance in front of the camera, then cast DOWN from there for
+	 *      DownTraceDistance. If THAT hits, return the downward impact.
+	 *   3. Still nothing (infinite drop) -> return the in-front fallback unmodified so the
+	 *      caller at least gets a point in world space instead of a zero vector.
+	 *
+	 * @param IgnoreActors  Actors the line trace must skip (typically the player pawn and,
+	 *                      for re-snapping an existing actor, the actor itself — otherwise
+	 *                      the trace hits its own mesh and nothing moves).
+	 */
+	PS_EDITOR_API FVector ProjectCameraRayToGround(UWorld* World,
+		const FVector& Start,
+		const FVector& Direction,
+		const TArray<AActor*>& IgnoreActors = {},
+		float MaxCameraDistance = 20000.0f,
+		float DefaultDistance = 1500.0f,
+		float DownTraceDistance = 50000.0f);
+
+	/**
+	 * Compute a world position such that Actor's bounding-box bottom lands on the ground
+	 * directly under its current XY position. Optionally adds a SpawnableComponent's
+	 * GroundOffset for props that look better floating slightly (rugs, characters, etc.).
+	 *
+	 * Properly handles pivots not at bbox center (e.g. characters with pivot at feet) by
+	 * measuring the pivot-to-bbox-bottom delta from GetActorBounds.
+	 *
+	 * The downward ray starts AT the actor's pivot (+ small buffer), not above its bbox.
+	 * This keeps the trace origin within the current room (the pivot is always inside or
+	 * on the edge of the actor's own volume) so the snap lands on the floor the actor is
+	 * currently in, even when the actor has been nudged slightly into a ceiling. A multi-
+	 * hit trace + a normal.Z >= 0.3 floor filter skips walls, ceilings, and backfaces
+	 * encountered on the way down.
+	 *
+	 * OverheadRaise is kept for API compatibility but is no longer used — starting above
+	 * the bbox was exactly what caused "End teleports to the upper story" bugs.
+	 *
+	 * @return true + OutLocation filled when ground was found; false when nothing is below.
+	 */
+	PS_EDITOR_API bool SnapActorToGround(AActor* Actor,
+		FVector& OutLocation,
+		float OverheadRaise = 50.0f,
+		float MaxDistance = 50000.0f,
+		const TArray<AActor*>& ExtraIgnored = {});
+}

Unreal/Plugins/PS_Editor/Source/PS_Editor/Selection/PS_Editor_SelectionManager.cpp

@@ -3,6 +3,7 @@
 #include "PS_Editor_UndoManager.h"
 #include "PS_Editor_PlayerController.h"
 #include "PS_Editor_SpawnManager.h"
+#include "PS_Editor_GroundSnap.h"
 #include "PS_Editor_EditableComponent.h"
 #include "PS_Editor_SpawnableComponent.h"
 #include "PS_Editor_SplineActor.h"
@@ -194,7 +195,7 @@ void UPS_Editor_SelectionManager::SelectActor(AActor* Actor)
 		Spline->SetSelected(true);
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Selected %s"), *Actor->GetName());
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Selected %s"), *Actor->GetName());
 }
 
 void UPS_Editor_SelectionManager::DeselectActor(AActor* Actor)
@@ -234,7 +235,7 @@ void UPS_Editor_SelectionManager::DeselectActor(AActor* Actor)
 			}
 		}
 
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Deselected %s"), *Actor->GetName());
+		UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Deselected %s"), *Actor->GetName());
 	}
 }
 
@@ -286,7 +287,7 @@ void UPS_Editor_SelectionManager::ClearSelection()
 
 	if (Count > 0)
 	{
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Cleared selection (%d actors)"), Count);
+		UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Cleared selection (%d actors)"), Count);
 	}
 }
 
@@ -448,6 +449,11 @@ void UPS_Editor_SelectionManager::SnapSelectionToGround()
 	TSharedPtr<FPS_Editor_TransformAction> UndoAction = MakeShared<FPS_Editor_TransformAction>();
 	UndoAction->Description = FString::Printf(TEXT("Snap to ground %d actor(s)"), SelectedActors.Num());
 
+	// Extra ignores shared across every actor in the batch.
+	TArray<AActor*> ExtraIgnored;
+	if (APawn* Pwn = PC->GetPawn()) ExtraIgnored.Add(Pwn);
+	if (Gizmo) ExtraIgnored.Add(Gizmo);
+
 	for (const TWeakObjectPtr<AActor>& Weak : SelectedActors)
 	{
 		AActor* Actor = Weak.Get();
@@ -456,36 +462,11 @@ void UPS_Editor_SelectionManager::SnapSelectionToGround()
 		UndoAction->Actors.Add(Actor);
 		UndoAction->OldTransforms.Add(Actor->GetActorTransform());
 
-		FVector Origin, Extent;
+		FVector NewLocation;
-		Actor->GetActorBounds(false, Origin, Extent);
+		if (PS_Editor_GroundSnap::SnapActorToGround(Actor, NewLocation,
-		float BottomOffset = Extent.Z;
+			/*OverheadRaise*/ 50.0f, /*MaxDistance*/ 50000.0f, ExtraIgnored))
-
-		// Add custom ground offset from SpawnableComponent if available
-		if (UPS_Editor_SpawnableComponent* SpawnComp = Actor->FindComponentByClass<UPS_Editor_SpawnableComponent>())
 		{
-			BottomOffset += SpawnComp->GroundOffset;
-		}
-
-		const FVector Start = Actor->GetActorLocation();
-		const FVector End = Start - FVector::UpVector * 100000.0f;
-
-		FHitResult Hit;
-		FCollisionQueryParams Params;
-		Params.AddIgnoredActor(Actor);
-		Params.AddIgnoredActor(PC->GetPawn());
-		if (Gizmo) Params.AddIgnoredActor(Gizmo);
-
-		if (Actor->GetWorld()->LineTraceSingleByChannel(Hit, Start, End, ECC_Camera, Params))
-		{
-			FVector NewLocation = Hit.ImpactPoint;
-			NewLocation.Z += BottomOffset;
 			Actor->SetActorLocation(NewLocation);
-
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: SnapToGround '%s' -> Hit '%s' (%s) at Z=%.1f, BottomOffset=%.1f, NewZ=%.1f"),
-				*Actor->GetName(),
-				*Hit.GetActor()->GetName(),
-				*Hit.GetComponent()->GetName(),
-				Hit.ImpactPoint.Z, BottomOffset, NewLocation.Z);
 		}
 		else
 		{

Unreal/Plugins/PS_Editor/Source/PS_Editor/Selection/PS_Editor_SelectionManager.h

@@ -106,6 +106,11 @@ public:
 
 	FPS_Editor_OnSelectionChanged OnSelectionChanged;
 
+	/** Update gizmo visibility, position, orientation, and axis constraints from the
+	 *  current selection. Called on every selection mutation, and per-tick during
+	 *  simulation so the gizmo tracks animated pawns. */
+	void UpdateGizmo();
+
 private:
 	UPROPERTY()
 	TWeakObjectPtr<APlayerController> OwnerPC;
@@ -127,7 +132,4 @@ private:
 
 	/** Clean up any stale weak pointers in the selection array. */
 	void CleanupStaleReferences();
-
-	/** Update gizmo visibility and position based on current selection. */
-	void UpdateGizmo();
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/Selection/PS_Editor_UndoManager.cpp

@@ -13,6 +13,11 @@ void FPS_Editor_SplinePointAction::Execute()
 	else if (SplineActor.IsValid() && SplineActor->GetClass()->ImplementsInterface(UPS_Editor_ChildMovable::StaticClass()))
 	{
 		IPS_Editor_ChildMovable::Execute_SetAllChildLocations(SplineActor.Get(), NewPoints);
+		// Apply rotations only if the BP captured them (otherwise we'd reset to identity).
+		if (NewRotations.Num() > 0)
+		{
+			IPS_Editor_ChildMovable::Execute_SetAllChildRotations(SplineActor.Get(), NewRotations);
+		}
 	}
 }
 
@@ -25,6 +30,10 @@ void FPS_Editor_SplinePointAction::Undo()
 	else if (SplineActor.IsValid() && SplineActor->GetClass()->ImplementsInterface(UPS_Editor_ChildMovable::StaticClass()))
 	{
 		IPS_Editor_ChildMovable::Execute_SetAllChildLocations(SplineActor.Get(), OldPoints);
+		if (OldRotations.Num() > 0)
+		{
+			IPS_Editor_ChildMovable::Execute_SetAllChildRotations(SplineActor.Get(), OldRotations);
+		}
 	}
 }
 
@@ -89,7 +98,7 @@ void UPS_Editor_UndoManager::RecordAction(TSharedPtr<FPS_Editor_Action> Action)
 
 	PruneHistory();
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Recorded action: %s (stack size: %d)"),
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Recorded action: %s (stack size: %d)"),
 		*Action->GetDescription(), ActionStack.Num());
 }
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/Selection/PS_Editor_UndoManager.h

@@ -170,6 +170,11 @@ struct FPS_Editor_SplinePointAction : public FPS_Editor_Action
 	TWeakObjectPtr<AActor> SplineActor;
 	TArray<FVector> OldPoints;
 	TArray<FVector> NewPoints;
+	// ChildMovable-only: rotation snapshots. Empty for spline points and for ChildMovable BPs
+	// that don't implement rotation. Execute/Undo only apply rotations when both arrays match
+	// the points array length.
+	TArray<FRotator> OldRotations;
+	TArray<FRotator> NewRotations;
 	FString Description;
 
 	virtual void Execute() override;

Unreal/Plugins/PS_Editor/Source/PS_Editor/Serialization/PS_Editor_SceneData.h

@@ -61,4 +61,17 @@ struct FPS_Editor_SceneData
 	/** Global timeline data (animation tracks + duration). Empty on legacy scenes. */
 	UPROPERTY()
 	FPS_Editor_TimelineData Timeline;
+
+	/** If true, the level's nav mesh is switched to Dynamic runtime generation when this
+	 *  scenario loads — both in the runtime editor (so spawn / move actors update nav live)
+	 *  and in gameplay (for scenarios that need runtime-built navigation). False keeps the
+	 *  cooked Static nav, which has zero runtime cost. Default: false. */
+	UPROPERTY()
+	bool bUseDynamicNavigation = false;
+
+	/** Project-specific scenario type as a uint8 (index into UPS_Editor_MasterCatalog::ScenarioTypeEnum).
+	 *  Selected by the user via the Settings popup dropdown. Defaults to 0 (= first enum entry) for
+	 *  legacy scenarios that were saved before this field existed. */
+	UPROPERTY()
+	uint8 ScenarioType = 0;
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/Serialization/PS_Editor_SceneLoader.cpp

@@ -10,6 +10,7 @@
 #include "PS_Editor_TimelineSubsystem.h"
 #include "PS_Editor_SpawnManager.h"
 #include "PS_Editor_PlayerController.h"
+#include "PS_Editor_NavUtils.h"
 #include "AIController.h"
 #include "BrainComponent.h"
 #include "JsonObjectConverter.h"
@@ -48,11 +49,13 @@ namespace
 	}
 }
 
-bool UPS_Editor_SceneLoader::LoadScene(const UObject* WorldContextObject, const FString& SceneName, TArray<AActor*>& OutActors, bool bStripEditorComponents, EPS_Editor_SceneLoadFilter Filter)
+TArray<TWeakObjectPtr<AActor>> UPS_Editor_SceneLoader::TrackedSpawnedActors;
+
+bool UPS_Editor_SceneLoader::LoadScenario(const UObject* WorldContextObject, const FString& ScenarioName, TArray<AActor*>& OutActors, bool bStripEditorComponents, EPS_Editor_SceneLoadFilter Filter)
 {
 	OutActors.Empty();
 
-	if (!WorldContextObject || SceneName.IsEmpty())
+	if (!WorldContextObject || ScenarioName.IsEmpty())
 	{
 		return false;
 	}
@@ -64,7 +67,7 @@ bool UPS_Editor_SceneLoader::LoadScene(const UObject* WorldContextObject, const
 	}
 
 	// Read JSON file
-	const FString FilePath = GetSceneFilePath(SceneName);
+	const FString FilePath = GetSceneFilePath(ScenarioName);
 	FString JsonString;
 	if (!FFileHelper::LoadFileToString(JsonString, *FilePath))
 	{
@@ -80,11 +83,22 @@ bool UPS_Editor_SceneLoader::LoadScene(const UObject* WorldContextObject, const
 		return false;
 	}
 
-	if (!LoadSceneFromData(World, SceneData, OutActors, Filter))
+	if (!LoadScenarioFromData(World, SceneData, OutActors, Filter))
 	{
 		return false;
 	}
 
+	// Track every spawned actor so UnloadScenario() can dispose of them later — this is the
+	// briefing-flow hook (load preload markers, then unload on scenario change). Gameplay
+	// callers that never unload don't pay a price beyond a small TWeakObjectPtr array.
+	for (AActor* Actor : OutActors)
+	{
+		if (Actor)
+		{
+			TrackedSpawnedActors.Add(Actor);
+		}
+	}
+
 	// Strip editor-only components for clean gameplay
 	if (bStripEditorComponents)
 	{
@@ -93,11 +107,6 @@ bool UPS_Editor_SceneLoader::LoadScene(const UObject* WorldContextObject, const
 			if (!Actor) continue;
 
 			TArray<UActorComponent*> ToRemove;
-			for (UActorComponent* Comp : Actor->GetComponentsByInterface(UPS_Editor_PointPlaceable::StaticClass()))
-			{
-				// Don't remove — PointPlaceable is on the actor itself, not a component
-			}
-
 			if (UActorComponent* Spawnable = Actor->FindComponentByClass<UPS_Editor_SpawnableComponent>())
 			{
 				ToRemove.Add(Spawnable);
@@ -123,14 +132,54 @@ bool UPS_Editor_SceneLoader::LoadScene(const UObject* WorldContextObject, const
 	return true;
 }
 
-bool UPS_Editor_SceneLoader::LoadSceneFromData(UWorld* World, const FPS_Editor_SceneData& SceneData, TArray<AActor*>& OutActors, EPS_Editor_SceneLoadFilter Filter)
+int32 UPS_Editor_SceneLoader::UnloadScenario(const UObject* WorldContextObject)
+{
+	int32 Destroyed = 0;
+	for (TWeakObjectPtr<AActor>& Weak : TrackedSpawnedActors)
+	{
+		if (AActor* Actor = Weak.Get())
+		{
+			Actor->Destroy();
+			++Destroyed;
+		}
+		// else: already gone (GC, manual destroy, level reload) — skip silently
+	}
+	TrackedSpawnedActors.Reset();
+
+	if (Destroyed > 0)
+	{
+		UE_LOG(LogTemp, Log, TEXT("PS_Editor SceneLoader: UnloadScenario destroyed %d actor(s)"), Destroyed);
+	}
+	return Destroyed;
+}
+
+bool UPS_Editor_SceneLoader::LoadScenarioFromData(UWorld* World, const FPS_Editor_SceneData& SceneData, TArray<AActor*>& OutActors, EPS_Editor_SceneLoadFilter Filter)
 {
 	if (!World)
 	{
 		return false;
 	}
 
-	UPS_Editor_TimelineSubsystem* TimelineSS = World->GetSubsystem<UPS_Editor_TimelineSubsystem>();
+	// Defensive: reaching the gameplay-side SceneLoader means we are NOT in the runtime
+	// editor (the editor uses UPS_Editor_SceneSerializer instead). Force the static flag
+	// false now so subsequent IsInEditorMode() checks reflect reality even if a previous
+	// PIE session left the static at 'true' — PIE keeps C++ statics across stop/start, and
+	// a forced PIE-stop or BP-driven OpenLevel can skip the EndPlay reset on the editor PC.
+	bIsEditorModeActive = false;
+
+	// Apply the scenario's dynamic-navigation flag BEFORE spawning actors. If the scenario
+	// needs runtime nav generation, switching the level's RecastNavMesh to Dynamic now
+	// means the actors we're about to spawn will dirty + rebuild tiles around them. Cooked
+	// Static nav is preserved on disk for scenarios that don't need this.
+	PS_Editor_NavUtils::SetDynamicNavigationEnabled(World, SceneData.bUseDynamicNavigation);
+
+	// PreloadOnly is the briefing path: only player-placement markers / briefing props
+	// should spawn, and the briefing scene runs its OWN timeline (don't push the scenario's
+	// timeline data or auto-play it). Skip the timeline subsystem entirely in that case.
+	const bool bSkipTimeline = (Filter == EPS_Editor_SceneLoadFilter::PreloadOnly);
+	UPS_Editor_TimelineSubsystem* TimelineSS = bSkipTimeline
+		? nullptr
+		: World->GetSubsystem<UPS_Editor_TimelineSubsystem>();
 
 	int32 SpawnedCount = 0;
 
@@ -140,7 +189,8 @@ bool UPS_Editor_SceneLoader::LoadSceneFromData(UWorld* World, const FPS_Editor_S
 		AActor* SpawnedActor = SpawnActorFromData(World, ActorData, Filter);
 		if (SpawnedActor)
 		{
-			// Register the stable ID so timeline tracks can find this actor
+			// Register the stable ID so timeline tracks can find this actor.
+			// Only when timeline is active for this load (PreloadOnly skips the subsystem).
 			if (TimelineSS && ActorData.ActorId.IsValid())
 			{
 				TimelineSS->RegisterActorId(SpawnedActor, ActorData.ActorId);
@@ -206,8 +256,8 @@ bool UPS_Editor_SceneLoader::LoadSceneFromData(UWorld* World, const FPS_Editor_S
 		}
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor SceneLoader: Loaded %d actors from scene '%s'"),
+	UE_LOG(LogTemp, Log, TEXT("PS_Editor SceneLoader: Loaded %d actor(s) from scenario '%s' [filter=%d]"),
-		SpawnedCount, *SceneData.SceneName);
+		SpawnedCount, *SceneData.SceneName, (int32)Filter);
 	return SpawnedCount > 0;
 }
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/Serialization/PS_Editor_SceneLoader.h

@@ -5,7 +5,7 @@
 #include "Kismet/BlueprintFunctionLibrary.h"
 #include "PS_Editor_SceneLoader.generated.h"
 
-/** Filter for selective scene loading. */
+/** Filter for selective scenario loading. */
 UENUM(BlueprintType)
 enum class EPS_Editor_SceneLoadFilter : uint8
 {
@@ -15,20 +15,27 @@ enum class EPS_Editor_SceneLoadFilter : uint8
 };
 
 /**
- * Standalone scene loader for PS_Editor.
+ * Standalone scenario loader for PS_Editor.
- * Loads a JSON scene file and spawns all actors with their properties and spline data.
+ * A "scenario" is a .pss file describing actors + properties + timeline saved by the runtime
+ * editor. This loader spawns those actors into an already-loaded UE level — it does NOT
+ * change the current UE level. Spawning is additive: existing world content is preserved.
  *
  * This is the entry point for GAME MODE usage — it does NOT require
  * PS_Editor's PlayerController, SelectionManager, Gizmo, or UI.
- * Just call LoadScene() from your GameMode's BeginPlay.
+ * Just call LoadScenario() from your GameMode's BeginPlay.
  *
  * Usage:
  *   void AMyGameMode::BeginPlay()
  *   {
  *       Super::BeginPlay();
  *       TArray<AActor*> SpawnedActors;
- *       UPS_Editor_SceneLoader::LoadScene(GetWorld(), TEXT("MyScene"), SpawnedActors);
+ *       UPS_Editor_SceneLoader::LoadScenario(GetWorld(), TEXT("MyScenario"), SpawnedActors);
  *   }
+ *
+ * Briefing usage (player placement markers only, no timeline animation):
+ *   UPS_Editor_SceneLoader::UnloadScenario(this);
+ *   UPS_Editor_SceneLoader::LoadScenario(this, TEXT("MyScenario"), Out, true,
+ *       EPS_Editor_SceneLoadFilter::PreloadOnly);
  */
 UCLASS()
 class PS_EDITOR_API UPS_Editor_SceneLoader : public UBlueprintFunctionLibrary
@@ -37,59 +44,74 @@ class PS_EDITOR_API UPS_Editor_SceneLoader : public UBlueprintFunctionLibrary
 
 public:
 	/**
-	 * Load a scene from a JSON file and spawn all actors.
+	 * Load a scenario from a .pss file and spawn its actors into the current world.
 	 *
-	 * @param World                    The world to spawn actors into.
+	 * The call is additive — existing world content is preserved. Spawned actors are tracked
-	 * @param SceneName                Scene name (without .json extension).
+	 * internally so UnloadScenario() can clean them up; this lets you switch scenarios at
-	 * @param OutActors                Filled with all spawned actors.
+	 * runtime (typical briefing flow). When Filter == PreloadOnly, the timeline subsystem is
+	 * NOT touched (no SetData, no auto-play, no ActorId registration) so a briefing scene's
+	 * own timeline keeps running untouched.
+	 *
+	 * @param ScenarioName             Scenario name (without .pss extension).
+	 * @param OutActors                Filled with all spawned actors (also tracked internally).
 	 * @param bStripEditorComponents   If true, removes SpawnableComponent and EditableComponent after spawn (cleaner for gameplay).
-	 * @return                         True if the scene was loaded successfully.
+	 * @param Filter                   Which actors to spawn. PreloadOnly = briefing-only, skips timeline setup.
+	 * @return                         True if the scenario was loaded successfully.
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor", meta = (WorldContext = "WorldContextObject"))
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor", meta = (WorldContext = "WorldContextObject"))
-	static bool LoadScene(const UObject* WorldContextObject, const FString& SceneName, TArray<AActor*>& OutActors,
+	static bool LoadScenario(const UObject* WorldContextObject, const FString& ScenarioName, TArray<AActor*>& OutActors,
 		bool bStripEditorComponents = true, EPS_Editor_SceneLoadFilter Filter = EPS_Editor_SceneLoadFilter::All);
 
 	/**
-	 * Load scene from an already-parsed SceneData struct.
+	 * Destroy every actor previously spawned via LoadScenario(). No-op if nothing was loaded
-	 * Useful if you want to parse the JSON yourself or modify data before spawning.
+	 * or all tracked actors have already been GC'd / manually destroyed.
+	 * Call this before LoadScenario() when switching scenarios.
+	 * @return  Number of actors destroyed.
 	 */
-	static bool LoadSceneFromData(UWorld* World, const FPS_Editor_SceneData& SceneData, TArray<AActor*>& OutActors,
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor", meta = (WorldContext = "WorldContextObject"))
+	static int32 UnloadScenario(const UObject* WorldContextObject);
+
+	/**
+	 * Load scenario actors from an already-parsed SceneData struct.
+	 * Useful if you want to parse the .pss JSON yourself or modify data before spawning.
+	 */
+	static bool LoadScenarioFromData(UWorld* World, const FPS_Editor_SceneData& SceneData, TArray<AActor*>& OutActors,
 		EPS_Editor_SceneLoadFilter Filter = EPS_Editor_SceneLoadFilter::All);
 
 	/**
-	 * Get the directory where scenes are stored.
+	 * Get the directory where scenarios are stored.
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	static FString GetScenesDirectory();
 
 	/**
-	 * Get the full file path for a scene name.
+	 * Get the full file path for a scenario name.
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	static FString GetSceneFilePath(const FString& SceneName);
 
-	/** Get the full file path for a scene name and its base level. Uses level-specific subdirectory. */
+	/** Get the full file path for a scenario name and its base level. Uses level-specific subdirectory. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	static FString GetSceneFilePathForLevel(const FString& SceneName, const FString& LevelName);
 
 	/**
-	 * Get all saved scene names. Optionally filter by level name.
+	 * Get all saved scenario names. Optionally filter by level name.
-	 * @param LevelFilter  If not empty, only return scenes associated with this level.
+	 * @param LevelFilter  If not empty, only return scenarios associated with this level.
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	static TArray<FString> GetSavedSceneNames(const FString& LevelFilter = TEXT(""));
 
 	/**
-	 * Get the level name associated with a saved scene (reads the JSON header without spawning).
+	 * Get the level name associated with a saved scenario (reads the JSON header without spawning).
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	static FString GetSceneLevelName(const FString& SceneName);
 
 	/**
-	 * Returns true while a scene is being loaded (actors are being spawned from JSON).
+	 * Returns true while a scenario is being loaded (actors are being spawned from JSON).
 	 * Use in BeginPlay to skip default initialization — wait for OnPropertiesLoaded instead.
 	 */
-	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "PS_Editor")
 	static bool IsLoadingFromScene(const AActor* Actor);
 
 	/** Static flag: true while SceneLoader or SceneSerializer is spawning actors. */
@@ -99,13 +121,13 @@ public:
 	static bool bIsEditorModeActive;
 
 	/** Returns true if the PS_Editor runtime editor is currently active. Callable from any BP. */
-	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "PS_Editor")
 	static bool IsInEditorMode() { return bIsEditorModeActive; }
 
 	/**
-	 * Get all saved scenes for the current level.
+	 * Get all saved scenarios for the current level.
 	 */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor", meta = (WorldContext = "WorldContextObject"))
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor", meta = (WorldContext = "WorldContextObject"))
 	static TArray<FString> GetSavedSceneNamesForCurrentLevel(const UObject* WorldContextObject);
 
 private:
@@ -114,4 +136,8 @@ private:
 
 	/** Apply custom editable properties to a spawned actor. */
 	static void ApplyCustomProperties(AActor* Actor, const TMap<FString, FString>& CustomProperties);
+
+	/** Actors spawned via LoadScenario(), tracked so UnloadScenario() can find them.
+	 *  TWeakObjectPtr handles GC / manual destruction gracefully (skipped at unload time). */
+	static TArray<TWeakObjectPtr<AActor>> TrackedSpawnedActors;
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/Serialization/PS_Editor_SceneSerializer.cpp

@@ -14,6 +14,7 @@
 #include "GameFramework/CharacterMovementComponent.h"
 #include "PS_Editor_SplineEditable.h"
 #include "PS_Editor_TimelineSubsystem.h"
+#include "PS_Editor_NavUtils.h"
 #include "JsonObjectConverter.h"
 #include "Misc/FileHelper.h"
 #include "Misc/Paths.h"
@@ -110,7 +111,7 @@ bool UPS_Editor_SceneSerializer::SaveScene(const FString& SceneName, UPS_Editor_
 		if (IPS_Editor_SplineEditable* Spline = Cast<IPS_Editor_SplineEditable>(Actor))
 		{
 			Spline->ExportToCustomProperties(ActorData.CustomProperties);
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Exported spline with %d points, class=%s"),
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Exported spline with %d points, class=%s"),
 				Spline->GetNumPoints(), *ActorData.ClassPath);
 		}
 
@@ -166,6 +167,13 @@ bool UPS_Editor_SceneSerializer::SaveScene(const FString& SceneName, UPS_Editor_
 		SceneData.Timeline = TimelineSS->GetData();
 	}
 
+	// Per-scenario settings — read from the SpawnManager's session state.
+	if (SpawnManager)
+	{
+		SceneData.bUseDynamicNavigation = SpawnManager->bUseDynamicNavigation;
+		SceneData.ScenarioType = SpawnManager->ScenarioType;
+	}
+
 	// Convert to JSON
 	FString JsonString;
 	if (!FJsonObjectConverter::UStructToJsonObjectString(SceneData, JsonString, 0, 0, 0, nullptr, true))
@@ -194,7 +202,7 @@ bool UPS_Editor_SceneSerializer::SaveScene(const FString& SceneName, UPS_Editor_
 	return true;
 }
 
-bool UPS_Editor_SceneSerializer::LoadScene(const FString& SceneName, UPS_Editor_SpawnManager* SpawnManager)
+bool UPS_Editor_SceneSerializer::LoadScenario(const FString& SceneName, UPS_Editor_SpawnManager* SpawnManager)
 {
 	if (!SpawnManager || SceneName.IsEmpty())
 	{
@@ -438,6 +446,24 @@ bool UPS_Editor_SceneSerializer::LoadScene(const FString& SceneName, UPS_Editor_
 		}
 	}
 
+	// Per-scenario settings — push into the SpawnManager's session state and apply
+	// the dynamic-navigation switch to the level's RecastNavMesh actors right away.
+	if (SpawnManager)
+	{
+		SpawnManager->bUseDynamicNavigation = SceneData.bUseDynamicNavigation;
+		SpawnManager->ScenarioType = SceneData.ScenarioType;
+		if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOuter()))
+		{
+			PS_Editor_NavUtils::SetDynamicNavigationEnabled(EditorPC->GetWorld(), SpawnManager->bUseDynamicNavigation);
+		}
+
+		// Re-add any mandatory actors missing from the loaded scene. Handles legacy saves
+		// that predate the bIsMandatory flag — the mandatory actor is auto-spawned at the
+		// baseLevel's MandatorySpawnAnchor. If all mandatory actors were already in the JSON,
+		// this is a no-op.
+		SpawnManager->EnsureMandatoryActorsPresent();
+	}
+
 	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Scene loaded: %s (%d actors)"), *SceneName, SpawnedCount);
 	return true;
 }
@@ -494,6 +520,14 @@ void UPS_Editor_SceneSerializer::ClearScene(UPS_Editor_SpawnManager* SpawnManage
 			}
 		}
 	}
+
+	// NOTE: Mandatory-actor auto-spawn is intentionally NOT done here. ClearScene is called
+	// from three contexts: (1) "New Scenario" button (we want mandatory spawn — handled in the
+	// widget after ClearScene returns), (2) LoadScenario before re-spawning saved actors (we
+	// don't want it — the JSON itself contains the mandatory actor, and there's a final
+	// EnsureMandatoryActorsPresent at the end of LoadScenario that handles legacy saves), and
+	// (3) BaseLevel switch (we don't want it — the new baseLevel isn't loaded yet, the
+	// MandatoryAnchor isn't in the world; the post-OnLevelShown hook handles that).
 }
 
 FString UPS_Editor_SceneSerializer::GetSceneFilePath(const FString& SceneName) const

Unreal/Plugins/PS_Editor/Source/PS_Editor/Serialization/PS_Editor_SceneSerializer.h

@@ -21,8 +21,8 @@ public:
 	/** Save the current spawned actors to a JSON file. */
 	bool SaveScene(const FString& SceneName, UPS_Editor_SpawnManager* SpawnManager);
 
-	/** Load a scene from a JSON file. Destroys current spawned actors and re-spawns from file. */
+	/** Load a scenario from a .pss file. Destroys current spawned actors and re-spawns from file. */
-	bool LoadScene(const FString& SceneName, UPS_Editor_SpawnManager* SpawnManager);
+	bool LoadScenario(const FString& SceneName, UPS_Editor_SpawnManager* SpawnManager);
 
 	/** Get a list of all saved scene names (without .json extension). */
 	TArray<FString> GetSavedSceneNames() const;

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_ChildMovable.h

@@ -25,47 +25,67 @@ class PS_EDITOR_API IPS_Editor_ChildMovable
 
 public:
 	/** Number of movable sub-elements. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	int32 GetMovableChildCount() const;
 
 	/** World location of the sub-element at the given index. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	FVector GetChildLocation(int32 Index) const;
 
 	/** Move the sub-element at the given index to a new world position. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	void MoveChild(int32 Index, const FVector& NewWorldPosition);
 
 	/** Return all sub-element positions (used for undo snapshots). */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	TArray<FVector> GetAllChildLocations() const;
 
 	/** Restore all sub-element positions (used for undo). */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	void SetAllChildLocations(const TArray<FVector>& Positions);
 
+	/** World rotation of the sub-element at the given index. Implement to constrain the
+	 *  rotation axes you actually expose (e.g. yaw only) — the plugin gizmo writes whatever
+	 *  the user drags, so any clamping must happen in RotateChild on the BP side. */
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
+	FRotator GetChildRotation(int32 Index) const;
+
+	/** Apply a new world rotation to the sub-element at the given index. The BP impl is the
+	 *  right place to drop unsupported axes (e.g. keep only Yaw, force Pitch/Roll to zero). */
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
+	void RotateChild(int32 Index, const FRotator& NewWorldRotation);
+
+	/** Return all sub-element rotations (used for undo snapshots). Empty array allowed if
+	 *  rotation is not supported on this actor — the undo system then ignores rotation. */
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
+	TArray<FRotator> GetAllChildRotations() const;
+
+	/** Restore all sub-element rotations (used for undo). */
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
+	void SetAllChildRotations(const TArray<FRotator>& Rotations);
+
 	/** Index of the sub-element under the cursor ray (-1 if none).
 	 *  Implement with sphere-ray intersection or any hit detection that suits your visuals. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	int32 GetChildIndexUnderCursor(const FVector& RayOrigin, const FVector& RayDirection) const;
 
 	/** Show or hide visual handles for the sub-elements. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	void SetChildHandlesVisible(bool bVisible);
 
 	/** Highlight a specific sub-element (e.g. change handle color). */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	void HighlightChild(int32 Index);
 
 	/** Clear all sub-element highlights. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	void ClearChildHighlight();
 
 	/** Export sub-element positions to the CustomProperties map for scene saving. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	void ExportChildLocations(TMap<FString, FString>& OutProperties) const;
 
 	/** Import sub-element positions from the CustomProperties map on scene load. */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor|Child Movable")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Child Movable")
 	void ImportChildLocations(const TMap<FString, FString>& Properties);
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_EditableComponent.cpp

@@ -181,7 +181,7 @@ void UPS_Editor_EditableComponent::PostEditChangeProperty(FPropertyChangedEvent&
 				FPS_Editor_EditablePropertyEntry NewEntry;
 				NewEntry.Path = FullPath;
 				EditableProperties.Add(NewEntry);
-				UE_LOG(LogTemp, Log, TEXT("PS_Editor: Added editable property: %s"), *FullPath.ToString());
+				UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Added editable property: %s"), *FullPath.ToString());
 			}
 
 			AddProperty = NAME_None; // Reset for next pick

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_EditableComponent.h

@@ -15,25 +15,25 @@ struct FPS_Editor_EditablePropertyEntry
 	/**
 	 * Property path: "ComponentName.PropertyName" or just "PropertyName" for actor-level.
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	FName Path;
 
 	/** Display name override for the runtime editor UI. If empty, the property name is used. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	FString DisplayName;
 
 	/**
 	 * If true, calls OnEditorPropertiesChanged (IPS_Editor_EditableInterface)
 	 * after changing this property, so the actor can re-run its initialization logic.
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	bool bNeedsReinit = false;
 
 	/**
 	 * If true, the actor is destroyed and respawned with all current properties applied,
 	 * then OnEditorPropertiesChanged is called. Use when reinit alone is not enough.
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	bool bNeedsRespawn = false;
 
 	/**
@@ -43,7 +43,7 @@ struct FPS_Editor_EditablePropertyEntry
 	 * Replicated (ideally ReplicatedUsing=OnRep_X) — the server-side timeline writes the value
 	 * and standard UE replication pushes it to clients.
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	bool bAnimatable = false;
 };
 
@@ -56,7 +56,7 @@ struct FPS_Editor_EditablePropertyEntry
  * 2. Pick a property from "Add Property" (filtered to that component)
  * 3. It auto-adds to "Editable Properties" as "Component.Property"
  */
-UCLASS(ClassGroup = "ASTERION|PS Editor", meta = (BlueprintSpawnableComponent, DisplayName = "PS Editor Editable"))
+UCLASS(ClassGroup = "PS Editor", meta = (BlueprintSpawnableComponent, DisplayName = "PS Editor Editable"))
 class PS_EDITOR_API UPS_Editor_EditableComponent : public UActorComponent
 {
 	GENERATED_BODY()

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_EditableInterface.h

@@ -15,7 +15,7 @@ struct FPS_Editor_PropertyOption
 	GENERATED_BODY()
 
 	/** Label shown in the runtime editor combo box. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	FString DisplayName;
 
 	/**
@@ -24,7 +24,7 @@ struct FPS_Editor_PropertyOption
 	 * the full class path; for an enum you'd use the NameString; for a free FString,
 	 * any value you want stored.
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	FString Value;
 };
 
@@ -51,21 +51,21 @@ public:
 	 * The new value is already applied when this is called.
 	 * @param PropertyPath  The property that changed (e.g. "CharacterType" or "MyComponent.SomeProperty").
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorPropertyChanged(const FString& PropertyPath);
 
 	/**
 	 * Called when a property with bNeedsReinit is changed.
 	 * The new value is already applied. Use this to re-run initialization logic.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorNeedsReinit();
 
 	/**
 	 * Called on the NEW actor after a respawn triggered by bNeedsRespawn.
 	 * All properties have been applied. Use this for post-respawn setup.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorNeedsRespawn();
 
 	/**
@@ -73,7 +73,7 @@ public:
 	 * Fires both in editor (SceneSerializer) and in gameplay (SceneLoader).
 	 * Use this to re-initialize your actor based on the loaded property values.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnPropertiesLoaded();
 
 	/**
@@ -81,7 +81,7 @@ public:
 	 * Use this to show/hide editor-only helpers (VR guides, placement aids, debug visuals, etc.).
 	 * @param bIsEditing  True when entering edit mode, false when leaving (Play, return to game).
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorModeChanged(bool bIsEditing);
 
 	/**
@@ -90,7 +90,7 @@ public:
 	 * the hood). Use this to kick off behaviour that should only happen while AI is live
 	 * (spawn FX, reset state counters, unlock input, etc.).
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorSimulateStart();
 
 	/**
@@ -102,7 +102,7 @@ public:
 	 * Timing: fires at the "AI cut" moment, AFTER any grace period the timeline applied
 	 * (typically 500ms after Stop was clicked). BT is still live but about to be disabled.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorSimulateStop();
 
 	/**
@@ -130,7 +130,7 @@ public:
 	 *     event still fires + grace period still granted)
 	 * Does NOT fire for direct StopSimulation calls (rare — e.g. forced editor close).
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorBeforeSimulateStop();
 
 	/**
@@ -138,7 +138,7 @@ public:
 	 * Use this to update visuals dynamically based on property changes, animate helpers, etc.
 	 * @param DeltaTime  Time since last frame.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	void OnEditorTick(float DeltaTime);
 
 	/**
@@ -150,7 +150,7 @@ public:
 	 * @return  List of option strings. Empty = use default widget / fall through to the
 	 *          structured variant below.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	TArray<FString> GetCustomOptionsForProperty(const FString& PropertyPath) const;
 
 	/**
@@ -164,7 +164,7 @@ public:
 	 * @param PropertyPath  The property path (e.g. "WeaponName" or "MyComponent.WeaponType").
 	 * @return  List of display/value pairs. Empty = fall back to the flat-string variant.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	TArray<FPS_Editor_PropertyOption> GetCustomOptionsWithValuesForProperty(const FString& PropertyPath) const;
 
 	/**
@@ -185,6 +185,6 @@ public:
 	 * @param PropertyPath  The property path (e.g. "Weapon" or "MyComponent.WeaponType").
 	 * @return  DisplayName to show in the combo, or empty string to fall back.
 	 */
-	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "ASTERION|PS_Editor")
+	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "PS Editor|Editable")
 	FString GetCurrentDisplayForProperty(const FString& PropertyPath) const;
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_FloorCutManager.cpp

@@ -0,0 +1,230 @@
+#include "PS_Editor_FloorCutManager.h"
+#include "PS_Editor_MandatoryAnchor.h"
+#include "PS_Editor_SceneLoader.h"
+#include "Components/PrimitiveComponent.h"
+#include "EngineUtils.h"
+#include "Engine/World.h"
+
+bool UPS_Editor_FloorCutManager::ShouldCreateSubsystem(UObject* Outer) const
+{
+	// Only create on real game worlds — skip preview / inactive worlds.
+	if (const UWorld* World = Cast<UWorld>(Outer))
+	{
+		const EWorldType::Type WT = World->WorldType;
+		return WT == EWorldType::Game || WT == EWorldType::PIE || WT == EWorldType::Editor;
+	}
+	return false;
+}
+
+void UPS_Editor_FloorCutManager::Initialize(FSubsystemCollectionBase& Collection)
+{
+	Super::Initialize(Collection);
+	bEnabled = false;
+	HeightAboveAnchor = 200.f;
+	bAnchorZCached = false;
+	CachedAnchorZ = 0.f;
+}
+
+void UPS_Editor_FloorCutManager::Deinitialize()
+{
+	// Restore everything we touched, so a world tear-down leaves a clean state.
+	RestoreAll();
+	Snapshots.Empty();
+	Super::Deinitialize();
+}
+
+void UPS_Editor_FloorCutManager::SetEnabled(bool bInEnabled)
+{
+	// Editor-only feature: silently ignore in gameplay mode. The widgets gate calls already,
+	// but this is a belt-and-braces safety so nothing leaks into a SceneLoader-driven runtime.
+	if (!UPS_Editor_SceneLoader::IsInEditorMode())
+	{
+		if (bEnabled)
+		{
+			RestoreAll();
+			bEnabled = false;
+		}
+		return;
+	}
+
+	if (bEnabled == bInEnabled) return;
+
+	bEnabled = bInEnabled;
+	if (bEnabled)
+	{
+		ApplyCutToWorld();
+	}
+	else
+	{
+		RestoreAll();
+	}
+}
+
+void UPS_Editor_FloorCutManager::SetHeightAboveAnchor(float HeightCm)
+{
+	// Clamp to a sane range matching the UI slider (0–1000 cm).
+	HeightCm = FMath::Clamp(HeightCm, 0.f, 10000.f);
+	if (FMath::IsNearlyEqual(HeightAboveAnchor, HeightCm)) return;
+
+	HeightAboveAnchor = HeightCm;
+	if (bEnabled)
+	{
+		ApplyCutToWorld();
+	}
+}
+
+float UPS_Editor_FloorCutManager::GetCutWorldZ() const
+{
+	if (!bAnchorZCached)
+	{
+		// Const-cast acceptable: lazy cache only, no observable mutation of "logical" state.
+		const_cast<UPS_Editor_FloorCutManager*>(this)->ResolveAnchorZ();
+	}
+	return CachedAnchorZ + HeightAboveAnchor;
+}
+
+void UPS_Editor_FloorCutManager::ReapplyCut()
+{
+	if (!bEnabled) return;
+	ApplyCutToWorld();
+}
+
+void UPS_Editor_FloorCutManager::OnActorSpawned(AActor* Actor)
+{
+	if (!bEnabled || !Actor) return;
+
+	ResolveAnchorZ();
+	const float CutZ = CachedAnchorZ + HeightAboveAnchor;
+
+	TArray<UPrimitiveComponent*> Prims;
+	Actor->GetComponents<UPrimitiveComponent>(Prims);
+	for (UPrimitiveComponent* P : Prims)
+	{
+		ApplyCutToComponent(P, CutZ);
+	}
+}
+
+void UPS_Editor_FloorCutManager::InvalidateAnchorCache()
+{
+	bAnchorZCached = false;
+}
+
+float UPS_Editor_FloorCutManager::ResolveAnchorZ()
+{
+	bAnchorZCached = true;
+	CachedAnchorZ = 0.f;
+
+	UWorld* World = GetWorld();
+	if (!World) return CachedAnchorZ;
+
+	for (TActorIterator<APS_Editor_MandatoryAnchor> It(World); It; ++It)
+	{
+		if (APS_Editor_MandatoryAnchor* Anchor = *It)
+		{
+			CachedAnchorZ = Anchor->GetActorLocation().Z;
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: FloorCut anchor Z = %f"), CachedAnchorZ);
+			return CachedAnchorZ;
+		}
+	}
+
+	UE_LOG(LogTemp, Warning, TEXT("PS_Editor: FloorCut — no APS_Editor_MandatoryAnchor found, using world Z=0 as reference"));
+	return CachedAnchorZ;
+}
+
+void UPS_Editor_FloorCutManager::ApplyCutToWorld()
+{
+	UWorld* World = GetWorld();
+	if (!World) return;
+
+	ResolveAnchorZ();
+	const float CutZ = CachedAnchorZ + HeightAboveAnchor;
+
+	int32 Hidden = 0;
+	int32 Visible = 0;
+
+	for (TActorIterator<AActor> ActorIt(World); ActorIt; ++ActorIt)
+	{
+		AActor* Actor = *ActorIt;
+		if (!Actor) continue;
+
+		// Never hide the anchor itself (it's hidden in game anyway, but defensive).
+		if (Actor->IsA<APS_Editor_MandatoryAnchor>()) continue;
+
+		TArray<UPrimitiveComponent*> Prims;
+		Actor->GetComponents<UPrimitiveComponent>(Prims);
+		for (UPrimitiveComponent* P : Prims)
+		{
+			if (!P) continue;
+
+			const FBoxSphereBounds B = P->Bounds;
+			const float MinZ = B.Origin.Z - B.BoxExtent.Z;
+			if (MinZ > CutZ)
+			{
+				ApplyCutToComponent(P, CutZ);
+				++Hidden;
+			}
+			else
+			{
+				// Component sits at or straddles the plane → must be in its restored state.
+				RestoreComponent(P);
+				++Visible;
+			}
+		}
+	}
+
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: FloorCut applied — CutZ=%.1f, hidden=%d, kept=%d, anchor=%.1f, height=%.1f"),
+		CutZ, Hidden, Visible, CachedAnchorZ, HeightAboveAnchor);
+}
+
+void UPS_Editor_FloorCutManager::ApplyCutToComponent(UPrimitiveComponent* Comp, float CutZ)
+{
+	if (!Comp) return;
+
+	const FBoxSphereBounds B = Comp->Bounds;
+	const float MinZ = B.Origin.Z - B.BoxExtent.Z;
+	if (MinZ <= CutZ)
+	{
+		// Below the plane — make sure it is in its restored state (caller may not have).
+		RestoreComponent(Comp);
+		return;
+	}
+
+	// Snapshot before first mutation, so we can restore the exact original state.
+	TWeakObjectPtr<UPrimitiveComponent> Key(Comp);
+	if (!Snapshots.Contains(Key))
+	{
+		FCutSnapshot Snap;
+		Snap.bWasVisible = Comp->IsVisible();
+		Snap.CollisionEnabled = Comp->GetCollisionEnabled();
+		Snapshots.Add(Key, Snap);
+	}
+
+	Comp->SetVisibility(false, /*bPropagateToChildren=*/false);
+	Comp->SetCollisionEnabled(ECollisionEnabled::NoCollision);
+}
+
+void UPS_Editor_FloorCutManager::RestoreComponent(UPrimitiveComponent* Comp)
+{
+	if (!Comp) return;
+	TWeakObjectPtr<UPrimitiveComponent> Key(Comp);
+	const FCutSnapshot* Snap = Snapshots.Find(Key);
+	if (!Snap) return;
+
+	Comp->SetVisibility(Snap->bWasVisible, /*bPropagateToChildren=*/false);
+	Comp->SetCollisionEnabled(Snap->CollisionEnabled);
+	Snapshots.Remove(Key);
+}
+
+void UPS_Editor_FloorCutManager::RestoreAll()
+{
+	for (auto It = Snapshots.CreateIterator(); It; ++It)
+	{
+		UPrimitiveComponent* Comp = It.Key().Get();
+		if (Comp)
+		{
+			Comp->SetVisibility(It.Value().bWasVisible, /*bPropagateToChildren=*/false);
+			Comp->SetCollisionEnabled(It.Value().CollisionEnabled);
+		}
+	}
+	Snapshots.Empty();
+}

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_FloorCutManager.h

@@ -0,0 +1,101 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Subsystems/WorldSubsystem.h"
+#include "Engine/EngineTypes.h"
+#include "UObject/WeakObjectPtr.h"
+#include "PS_Editor_FloorCutManager.generated.h"
+
+class UPrimitiveComponent;
+class APS_Editor_MandatoryAnchor;
+
+/**
+ * Editor-only horizontal "floor cut" plane.
+ *
+ * Hides every UPrimitiveComponent whose world-space bounds-min Z is strictly above
+ * AnchorZ + HeightAboveAnchor, by toggling per-component visibility and collision.
+ * The original state is snapshotted before any modification and restored on disable
+ * (or on plugin exit), so the feature is non-destructive.
+ *
+ * Editor-only by design — the gameplay runtime loaded via SceneLoader::LoadScene never
+ * touches this subsystem. UI in the editor widgets is the only consumer.
+ *
+ * Limitations:
+ *   - Components straddling the cut plane (minZ <= cut <= maxZ) stay fully visible.
+ *     Per-pixel cuts would require modifying master materials, which we explicitly
+ *     don't want.
+ *   - Anchor Z is sampled once and cached. If the user moves the APS_Editor_MandatoryAnchor
+ *     at runtime, call InvalidateAnchorCache() to re-sample.
+ *
+ * Usage:
+ *   - Get via UWorld::GetSubsystem<UPS_Editor_FloorCutManager>(World)
+ *   - SetEnabled(true), SetHeightAboveAnchor(200.f)
+ *   - OnActorSpawned(NewActor) when SpawnManager spawns a new actor while active
+ */
+UCLASS()
+class PS_EDITOR_API UPS_Editor_FloorCutManager : public UWorldSubsystem
+{
+	GENERATED_BODY()
+
+public:
+	// UWorldSubsystem
+	virtual void Initialize(FSubsystemCollectionBase& Collection) override;
+	virtual void Deinitialize() override;
+	virtual bool ShouldCreateSubsystem(UObject* Outer) const override;
+
+	/** Enable / disable the cut. On disable, all snapshotted components are restored. */
+	void SetEnabled(bool bInEnabled);
+	bool IsEnabled() const { return bEnabled; }
+
+	/** Set the cut height in centimeters above the MandatoryAnchor. Re-applies immediately
+	 *  if the cut is enabled. */
+	void SetHeightAboveAnchor(float HeightCm);
+	float GetHeightAboveAnchor() const { return HeightAboveAnchor; }
+
+	/** Computed world Z of the cut plane (AnchorZ + HeightAboveAnchor). Returns
+	 *  TNumericLimits<float>::Max() if no anchor is found. */
+	float GetCutWorldZ() const;
+
+	/** Force a re-application of the current cut on all current components.
+	 *  Cheap (no allocation if components haven't moved). */
+	void ReapplyCut();
+
+	/** Called by the SpawnManager whenever it spawns a new actor while the cut is
+	 *  active, so the new actor's primitives are evaluated against the cut. */
+	void OnActorSpawned(AActor* Actor);
+
+	/** Drop the cached anchor Z (re-sampled on next ReapplyCut). */
+	void InvalidateAnchorCache();
+
+private:
+	/** Per-component snapshot of the state we tweak, so we can restore exactly. */
+	struct FCutSnapshot
+	{
+		bool bWasVisible = true;
+		TEnumAsByte<ECollisionEnabled::Type> CollisionEnabled = ECollisionEnabled::QueryAndPhysics;
+	};
+
+	/** Apply the cut to a single primitive (snapshot if needed, then hide). */
+	void ApplyCutToComponent(UPrimitiveComponent* Comp, float CutZ);
+	/** Restore a single primitive from its snapshot, if any. */
+	void RestoreComponent(UPrimitiveComponent* Comp);
+
+	/** Walk the world and apply the cut to every primitive. */
+	void ApplyCutToWorld();
+	/** Restore every snapshotted primitive. */
+	void RestoreAll();
+
+	/** Find the world Z of the first MandatoryAnchor in the world, or fall back to 0.
+	 *  Result is cached in CachedAnchorZ. */
+	float ResolveAnchorZ();
+
+	bool bEnabled = false;
+	float HeightAboveAnchor = 200.f;          // cm — default 2m as agreed with user
+
+	bool bAnchorZCached = false;
+	float CachedAnchorZ = 0.f;
+
+	/** Snapshots of components we have modified, keyed by weak pointer so destroyed
+	 *  primitives are simply ignored on restore. */
+	TMap<TWeakObjectPtr<UPrimitiveComponent>, FCutSnapshot> Snapshots;
+};

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_MandatoryAnchor.cpp

@@ -0,0 +1,41 @@
+#include "PS_Editor_MandatoryAnchor.h"
+#include "Components/SceneComponent.h"
+#include "Components/ArrowComponent.h"
+#include "Components/BillboardComponent.h"
+#include "UObject/ConstructorHelpers.h"
+
+APS_Editor_MandatoryAnchor::APS_Editor_MandatoryAnchor()
+{
+	PrimaryActorTick.bCanEverTick = false;
+
+	USceneComponent* Root = CreateDefaultSubobject<USceneComponent>(TEXT("Root"));
+	RootComponent = Root;
+
+#if WITH_EDITORONLY_DATA
+	SpriteComponent = CreateDefaultSubobject<UBillboardComponent>(TEXT("Sprite"));
+	SpriteComponent->SetupAttachment(Root);
+	SpriteComponent->SetHiddenInGame(true);
+	SpriteComponent->bIsScreenSizeScaled = true;
+	SpriteComponent->ScreenSize = 0.0015f;
+
+	// Target-point icon — clearly distinct from APS_Editor_CameraStart's note icon.
+	// (Engine/EditorResources/S_Pivot does not exist in UE 5.5 — using S_TargetPoint instead,
+	// which fits the "positional anchor marker" semantic and avoids the cook-time
+	// "Failed to find /Engine/EditorResources/S_Pivot" CDO error.)
+	static ConstructorHelpers::FObjectFinder<UTexture2D> IconFinder(TEXT("/Engine/EditorResources/S_TargetPoint"));
+	if (IconFinder.Succeeded())
+	{
+		SpriteComponent->SetSprite(IconFinder.Object);
+	}
+
+	ArrowComponent = CreateDefaultSubobject<UArrowComponent>(TEXT("Arrow"));
+	ArrowComponent->SetupAttachment(Root);
+	ArrowComponent->ArrowColor = FColor(255, 200, 60); // orange so it pops in the viewport
+	ArrowComponent->ArrowSize = 1.5f;
+	ArrowComponent->bIsScreenSizeScaled = true;
+	ArrowComponent->SetHiddenInGame(true);
+#endif
+
+	// The anchor is purely a marker — no rendering in PIE / packaged
+	SetActorHiddenInGame(true);
+}

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_MandatoryAnchor.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Actor.h"
+#include "PS_Editor_MandatoryAnchor.generated.h"
+
+/**
+ * Standalone marker actor that defines where mandatory actors
+ * (UPS_Editor_SpawnableComponent::bIsMandatory) auto-spawn when a new scenario is created
+ * or when a legacy save is missing one.
+ *
+ * Usage:
+ *   - Place ONE instance of this actor in each baseLevel
+ *   - Position it freely — independent from APS_Editor_CameraStart
+ *   - Save the level
+ *
+ * The actor is hidden in game / PIE; it has a visible orange arrow + sprite in the level
+ * editor for placement. SpawnManager::EnsureMandatoryActorsPresent reads its world transform.
+ */
+UCLASS(BlueprintType, Blueprintable, meta = (DisplayName = "PS Editor Mandatory Anchor"))
+class PS_EDITOR_API APS_Editor_MandatoryAnchor : public AActor
+{
+	GENERATED_BODY()
+
+public:
+	APS_Editor_MandatoryAnchor();
+
+#if WITH_EDITORONLY_DATA
+protected:
+	/** Editor-only billboard sprite so the actor is easy to pick in the level. */
+	UPROPERTY(VisibleAnywhere, Category = "PS_Editor")
+	TObjectPtr<class UBillboardComponent> SpriteComponent;
+
+	/** Editor-only forward arrow visualizing the anchor's orientation. */
+	UPROPERTY(VisibleAnywhere, Category = "PS_Editor")
+	TObjectPtr<class UArrowComponent> ArrowComponent;
+#endif
+};

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_NavUtils.cpp

@@ -0,0 +1,348 @@
+#include "PS_Editor_NavUtils.h"
+#include "NavigationSystem.h"
+#include "NavigationData.h"
+#include "NavMesh/RecastNavMesh.h"
+#include "Engine/World.h"
+#include "Engine/GameViewportClient.h"
+#include "GameFramework/PlayerController.h"
+#include "Kismet/GameplayStatics.h"
+#include "DrawDebugHelpers.h"
+#include "ProceduralMeshComponent.h"
+#include "Materials/MaterialInterface.h"
+#include "UObject/ConstructorHelpers.h"
+#include "UObject/SoftObjectPath.h"
+
+namespace PS_Editor_NavUtils
+{
+	// ANavigationData::RuntimeGeneration and bEnableDrawing are both protected. Local
+	// using-trick subclass to re-publish them — the C++ access check uses the static
+	// type, so a static_cast through this exposing class lets us read/write them
+	// without modifying the engine.
+	struct FNavDataAccessor : public ANavigationData
+	{
+		using ANavigationData::RuntimeGeneration;
+		using ANavigationData::bEnableDrawing;
+	};
+
+	// Recast-specific draw flags exposer.
+	struct FRecastAccessor : public ARecastNavMesh
+	{
+		using ARecastNavMesh::bDrawTriangleEdges;
+		using ARecastNavMesh::bDrawPolyEdges;
+		using ARecastNavMesh::bDrawNavMeshEdges;
+		using ARecastNavMesh::bDrawTileBounds;
+	};
+
+	void SetRuntimeGenerationMode(UWorld* World, ERuntimeGenerationType Mode)
+	{
+		if (!World) return;
+
+		TArray<AActor*> NavMeshActors;
+		UGameplayStatics::GetAllActorsOfClass(World, ANavigationData::StaticClass(), NavMeshActors);
+		for (AActor* A : NavMeshActors)
+		{
+			if (ANavigationData* NavData = Cast<ANavigationData>(A))
+			{
+				FNavDataAccessor* Accessor = static_cast<FNavDataAccessor*>(NavData);
+				if (Accessor->RuntimeGeneration != Mode)
+				{
+					Accessor->RuntimeGeneration = Mode;
+				}
+			}
+		}
+	}
+
+	void SetDynamicNavigationEnabled(UWorld* World, bool bDynamic)
+	{
+		SetRuntimeGenerationMode(World,
+			bDynamic ? ERuntimeGenerationType::Dynamic : ERuntimeGenerationType::Static);
+	}
+
+	void SetNavMeshVisible(UWorld* World, bool bVisible)
+	{
+		if (!World) return;
+
+		// PIE/runtime nav visualization in UE has multiple gates that all need to align:
+		//
+		//   1. ANavigationData::bEnableDrawing   — controls whether the rendering
+		//      component creates a scene proxy at all.
+		//   2. ARecastNavMesh::bDrawNavMeshEdges (+ bDrawPolyEdges, bDrawTileBounds, etc.)
+		//      — control what the proxy actually paints. With bEnableDrawing=true but every
+		//      bDraw* flag false, the proxy is created but draws nothing.
+		//   3. GameViewportClient::EngineShowFlags.Navigation — the show-flag the
+		//      `show navigation` console command toggles. The proxy is only rendered
+		//      when this flag is on.
+		//   4. ReregisterAllComponents — if bEnableDrawing was false at construction
+		//      time, the rendering component never created its proxy. Toggling
+		//      bEnableDrawing alone won't recreate it; we have to re-register the
+		//      components so the proxy is rebuilt with the new flag value.
+		//
+		// All four are required for runtime visualization to actually appear.
+		TArray<AActor*> NavMeshActors;
+		UGameplayStatics::GetAllActorsOfClass(World, ANavigationData::StaticClass(), NavMeshActors);
+		for (AActor* A : NavMeshActors)
+		{
+			if (ANavigationData* NavData = Cast<ANavigationData>(A))
+			{
+				FNavDataAccessor* Accessor = static_cast<FNavDataAccessor*>(NavData);
+				Accessor->bEnableDrawing = bVisible;
+
+				// Recast-specific: enable enough draw flags that the proxy actually paints
+				// something visible. Edges only — tile bounds are noisy.
+				if (ARecastNavMesh* Recast = Cast<ARecastNavMesh>(NavData))
+				{
+					FRecastAccessor* RA = static_cast<FRecastAccessor*>(Recast);
+					RA->bDrawNavMeshEdges = bVisible;
+					RA->bDrawPolyEdges = bVisible;
+					RA->bDrawTriangleEdges = bVisible;
+				}
+
+				// Force proxy recreation. MarkComponentsRenderStateDirty alone is not
+				// enough when the proxy was never created (bEnableDrawing=false at init).
+				NavData->ReregisterAllComponents();
+			}
+		}
+
+		if (UGameViewportClient* GVC = World->GetGameViewport())
+		{
+			GVC->EngineShowFlags.SetNavigation(bVisible);
+		}
+	}
+
+	// ---- Custom navmesh visualization (works without engine modifications) ----
+	//
+	// Cache the geometry between frames to avoid the expensive GetDebugGeometry call every
+	// tick. We refresh it on a small interval (default 0.5s) — enough for visual feedback
+	// during dynamic nav rebuilds without burning CPU on static maps.
+	struct FCachedNavMeshGeo
+	{
+		TArray<FVector> Vertices;
+		TArray<int32> TriIndices; // groups of 3 — A B C
+	};
+	static TArray<FCachedNavMeshGeo> GCachedNavMeshes;
+	static float GTimeSinceRefresh = 9999.f; // force initial refresh
+
+	// Lift the cached navmesh geometry slightly so the wireframe + translucent surface don't
+	// z-fight with the floor mesh underneath (the navmesh sits exactly on the walkable surface
+	// per the cell height, which causes shimmering with translucent materials especially).
+	// 2cm is enough to suppress visual artifacts on typical level geometry without making the
+	// overlay look detached from the floor.
+	static constexpr float NavMeshDrawZOffset = 2.0f;
+
+	// ---- Surface visualization (procedural mesh + user-supplied translucent material) ----
+	//
+	// We spawn a single persistent actor with one UProceduralMeshComponent that holds the
+	// triangulated navmesh. Its material is loaded once from a hardcoded soft path:
+	//   /PS_Editor/M_PS_Editor_NavMeshSurface
+	// Users create that material in the plugin Content folder with their own settings
+	// (translucent, two-sided, color, etc). If the asset is missing, we log a one-shot warning
+	// and the surface stays hidden — the wireframe still draws so the feature degrades
+	// gracefully rather than crashing.
+	static const TCHAR* GNavMeshSurfaceMaterialPath = TEXT("/PS_Editor/M_PS_Editor_NavMeshSurface.M_PS_Editor_NavMeshSurface");
+	static TWeakObjectPtr<AActor> GSurfaceActor;
+	static TWeakObjectPtr<UProceduralMeshComponent> GSurfaceMesh;
+	static TWeakObjectPtr<UMaterialInterface> GSurfaceMaterial;
+	static bool GSurfaceMaterialMissingWarned = false;
+
+	static UMaterialInterface* LoadSurfaceMaterial()
+	{
+		if (GSurfaceMaterial.IsValid()) return GSurfaceMaterial.Get();
+
+		// Always retry — LoadObject is cheap when the asset is already loaded, and we want
+		// the load to succeed even if the material was created AFTER the first attempt
+		// (Live Coding hot-reload, or user just created the asset). Suppressing retries
+		// breaks "create the material, hit P, see it work" without restarting the editor.
+		UMaterialInterface* Mat = LoadObject<UMaterialInterface>(nullptr, GNavMeshSurfaceMaterialPath);
+		if (Mat)
+		{
+			GSurfaceMaterial = Mat;
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: NavMesh surface material loaded from %s"), GNavMeshSurfaceMaterialPath);
+			GSurfaceMaterialMissingWarned = false;
+			return Mat;
+		}
+
+		if (!GSurfaceMaterialMissingWarned)
+		{
+			GSurfaceMaterialMissingWarned = true;
+			UE_LOG(LogTemp, Warning, TEXT("PS_Editor: NavMesh surface material not found at %s. ")
+				TEXT("Create a translucent material at that path to enable surface visualization. ")
+				TEXT("Falling back to wireframe-only."), GNavMeshSurfaceMaterialPath);
+		}
+		return nullptr;
+	}
+
+	static UProceduralMeshComponent* EnsureSurfaceComponent(UWorld* World)
+	{
+		if (!World) return nullptr;
+		if (GSurfaceMesh.IsValid()) return GSurfaceMesh.Get();
+
+		// Spawn a minimal actor and add a UProceduralMeshComponent at runtime. The actor is
+		// transient — never saved with the scenario, never selectable in the editor.
+		FActorSpawnParameters Params;
+		Params.ObjectFlags = RF_Transient;
+		Params.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;
+		AActor* Actor = World->SpawnActor<AActor>(AActor::StaticClass(), FTransform::Identity, Params);
+		if (!Actor) return nullptr;
+#if WITH_EDITOR
+		Actor->SetActorLabel(TEXT("PS_Editor_NavMeshSurfaceViz"));
+#endif
+
+		UProceduralMeshComponent* Mesh = NewObject<UProceduralMeshComponent>(Actor, TEXT("NavMeshSurface"));
+		Mesh->SetMobility(EComponentMobility::Movable);
+		Mesh->SetCollisionEnabled(ECollisionEnabled::NoCollision);
+		Mesh->bUseAsyncCooking = false;
+		Mesh->SetCastShadow(false);
+		Mesh->SetGenerateOverlapEvents(false);
+		Mesh->RegisterComponent();
+		Actor->SetRootComponent(Mesh);
+
+		GSurfaceActor = Actor;
+		GSurfaceMesh = Mesh;
+		return Mesh;
+	}
+
+	static void DestroySurfaceActor()
+	{
+		if (AActor* Actor = GSurfaceActor.Get())
+		{
+			Actor->Destroy();
+		}
+		GSurfaceActor.Reset();
+		GSurfaceMesh.Reset();
+	}
+
+	void ClearNavMeshDebugCache()
+	{
+		GCachedNavMeshes.Empty();
+		GTimeSinceRefresh = 9999.f;
+		DestroySurfaceActor();
+	}
+
+	void DrawNavMeshDebug(UWorld* World, float DeltaTime, float RefreshIntervalSeconds)
+	{
+		if (!World) return;
+
+		GTimeSinceRefresh += DeltaTime;
+		if (GTimeSinceRefresh >= RefreshIntervalSeconds || GCachedNavMeshes.Num() == 0)
+		{
+			GTimeSinceRefresh = 0.f;
+			GCachedNavMeshes.Empty();
+
+			TArray<AActor*> NavMeshActors;
+			UGameplayStatics::GetAllActorsOfClass(World, ARecastNavMesh::StaticClass(), NavMeshActors);
+			for (AActor* A : NavMeshActors)
+			{
+				if (ARecastNavMesh* Recast = Cast<ARecastNavMesh>(A))
+				{
+					Recast->BeginBatchQuery();
+
+					FCachedNavMeshGeo Cached;
+
+					// Iterate every tile and pull its debug geometry. UE 5.5 dropped the
+					// single-call GetDebugGeometry; only the per-tile variant remains.
+					// As of 5.5 the int32-tile-index overload is deprecated — use the
+					// FNavTileRef overload via GetAllNavMeshTiles.
+					TArray<FNavTileRef> TileRefs;
+					Recast->GetAllNavMeshTiles(TileRefs);
+					for (const FNavTileRef& TileRef : TileRefs)
+					{
+						FRecastDebugGeometry Geo;
+						Recast->GetDebugGeometryForTile(Geo, TileRef);
+
+						const int32 BaseIdx = Cached.Vertices.Num();
+						Cached.Vertices.Reserve(BaseIdx + Geo.MeshVerts.Num());
+						for (const FVector& V : Geo.MeshVerts)
+						{
+							Cached.Vertices.Add(V + FVector(0.f, 0.f, NavMeshDrawZOffset));
+						}
+						for (int32 AreaIdx = 0; AreaIdx < RECAST_MAX_AREAS; ++AreaIdx)
+						{
+							const TArray<int32>& AreaIndices = Geo.AreaIndices[AreaIdx];
+							Cached.TriIndices.Reserve(Cached.TriIndices.Num() + AreaIndices.Num());
+							for (int32 Idx : AreaIndices)
+							{
+								Cached.TriIndices.Add(BaseIdx + Idx);
+							}
+						}
+					}
+
+					Recast->FinishBatchQuery();
+					GCachedNavMeshes.Add(MoveTemp(Cached));
+				}
+			}
+
+			// Cache rebuilt — also refresh the procedural surface mesh so the translucent
+			// overlay tracks live navmesh changes. We merge every navmesh's geometry into a
+			// single section to keep the proc mesh component lightweight (one section, one
+			// material, one draw call).
+			if (UProceduralMeshComponent* Surface = EnsureSurfaceComponent(World))
+			{
+				TArray<FVector> Vertices;
+				TArray<int32> Triangles;
+				for (const FCachedNavMeshGeo& Cached : GCachedNavMeshes)
+				{
+					const int32 BaseIdx = Vertices.Num();
+					Vertices.Append(Cached.Vertices);
+					Triangles.Reserve(Triangles.Num() + Cached.TriIndices.Num());
+					for (int32 Idx : Cached.TriIndices)
+					{
+						Triangles.Add(BaseIdx + Idx);
+					}
+				}
+
+				// Empty arrays for normals/UVs/colors/tangents — the unlit translucent material
+				// the user provides doesn't need them. ProcMesh treats empty arrays as "skip
+				// this stream", which is fine for an unlit overlay.
+				static const TArray<FVector> EmptyNormals;
+				static const TArray<FVector2D> EmptyUVs;
+				static const TArray<FColor> EmptyColors;
+				static const TArray<FProcMeshTangent> EmptyTangents;
+
+				if (Vertices.Num() > 0 && Triangles.Num() > 0)
+				{
+					Surface->CreateMeshSection(/*SectionIndex=*/ 0, Vertices, Triangles,
+						EmptyNormals, EmptyUVs, EmptyColors, EmptyTangents,
+						/*bCreateCollision=*/ false);
+
+					UMaterialInterface* Mat = LoadSurfaceMaterial();
+					if (Mat)
+					{
+						Surface->SetMaterial(0, Mat);
+					}
+					Surface->SetVisibility(true);
+					UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: NavMesh surface refreshed — %d verts, %d tris, material=%s"),
+						Vertices.Num(), Triangles.Num() / 3,
+						Mat ? *Mat->GetName() : TEXT("<none, wireframe-only>"));
+				}
+				else
+				{
+					Surface->ClearAllMeshSections();
+				}
+			}
+		}
+
+		// Per-frame draw of cached geometry. Lifetime=0 + bPersistent=false means each call
+		// only paints for one frame, so we get clean redraw every tick.
+		const FColor EdgeColor(40, 220, 90); // green
+		for (const FCachedNavMeshGeo& Cached : GCachedNavMeshes)
+		{
+			const int32 NumTris = Cached.TriIndices.Num() / 3;
+			for (int32 t = 0; t < NumTris; ++t)
+			{
+				const int32 I0 = Cached.TriIndices[t * 3 + 0];
+				const int32 I1 = Cached.TriIndices[t * 3 + 1];
+				const int32 I2 = Cached.TriIndices[t * 3 + 2];
+				if (!Cached.Vertices.IsValidIndex(I0) || !Cached.Vertices.IsValidIndex(I1) || !Cached.Vertices.IsValidIndex(I2))
+				{
+					continue;
+				}
+				const FVector& V0 = Cached.Vertices[I0];
+				const FVector& V1 = Cached.Vertices[I1];
+				const FVector& V2 = Cached.Vertices[I2];
+				DrawDebugLine(World, V0, V1, EdgeColor, /*bPersistent=*/ false, /*LifeTime=*/ 0.f, /*DepthPriority=*/ 0, /*Thickness=*/ 1.0f);
+				DrawDebugLine(World, V1, V2, EdgeColor, false, 0.f, 0, 1.0f);
+				DrawDebugLine(World, V2, V0, EdgeColor, false, 0.f, 0, 1.0f);
+			}
+		}
+	}
+}

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_NavUtils.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "CoreMinimal.h"
+
+class UWorld;
+enum class ERuntimeGenerationType : uint8;
+
+/**
+ * Centralised helpers for switching the level's RecastNavMesh runtime-generation mode and
+ * toggling the runtime navmesh visualization. Used by:
+ *  - The runtime editor "Settings" popup (live toggle of dynamic nav + show navmesh)
+ *  - SceneLoader (gameplay path: applies the scenario's bUseDynamicNavigation flag)
+ *  - Scenario save/load (persists bUseDynamicNavigation in JSON)
+ */
+namespace PS_Editor_NavUtils
+{
+	/**
+	 * Switch every RecastNavMesh in the world to the requested runtime-generation mode.
+	 * Static = baked nav only, no runtime updates (fastest gameplay).
+	 * DynamicModifiersOnly = only NavModifierVolumes affect nav at runtime.
+	 * Dynamic = all collision-affecting actors update the nav mesh on spawn / move.
+	 *
+	 * Idempotent — calling with the same mode the navmesh already has is a no-op.
+	 */
+	PS_EDITOR_API void SetRuntimeGenerationMode(UWorld* World, ERuntimeGenerationType Mode);
+
+	/** Convenience: switch to Dynamic if bDynamic, Static otherwise. */
+	PS_EDITOR_API void SetDynamicNavigationEnabled(UWorld* World, bool bDynamic);
+
+	/**
+	 * Toggle the runtime navmesh visualization (mimics the editor's P key — green nav lines
+	 * + tile bounds rendered on top of the world). Affects all RecastNavMesh actors in the
+	 * world. Free in editor PIE/Standalone; in shipping packaged builds, debug rendering may
+	 * be stripped depending on build flags.
+	 */
+	PS_EDITOR_API void SetNavMeshVisible(UWorld* World, bool bVisible);
+
+	/**
+	 * Draw the navmesh as green debug lines for the current frame. Bypasses UE's own nav
+	 * debug renderer (which is gated behind UE_ALLOW_NAVMESH_DEBUG_DRAWING_IN_GAME and
+	 * doesn't work on binary engine installs at runtime). Pulls the geometry from each
+	 * ARecastNavMesh and emits DrawDebugLine calls — works in PIE / Standalone / packaged
+	 * shipping alike.
+	 *
+	 * Internally caches the FRecastDebugGeometry between calls and only refreshes it when
+	 * RefreshIntervalSeconds elapses, since GetDebugGeometry is expensive on big navmeshes.
+	 *
+	 * Call from a per-tick code path while the user wants the visualization shown; stop
+	 * calling when they hide it (DrawDebugLine entries auto-expire after 1 frame).
+	 */
+	PS_EDITOR_API void DrawNavMeshDebug(UWorld* World, float DeltaTime, float RefreshIntervalSeconds = 0.5f);
+
+	/** Drop the cached debug geometry (call when leaving editor mode / unloading scene). */
+	PS_EDITOR_API void ClearNavMeshDebugCache();
+}

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_SpawnCatalog.cpp

@@ -42,7 +42,7 @@ void UPS_Editor_SpawnCatalog::CaptureAllThumbnails()
 		// Skip if already has a custom thumbnail
 		if (SpawnComp->Thumbnail)
 		{
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: %s already has a thumbnail, skipping"), *LoadedClass->GetName());
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: %s already has a thumbnail, skipping"), *LoadedClass->GetName());
 			continue;
 		}
 
@@ -111,7 +111,7 @@ void UPS_Editor_SpawnCatalog::CaptureAllThumbnails()
 		Blueprint->MarkPackageDirty();
 
 		Captured++;
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Captured thumbnail for %s -> %s"), *Blueprint->GetName(), *FullPath);
+		UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Captured thumbnail for %s -> %s"), *Blueprint->GetName(), *FullPath);
 	}
 
 	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Captured %d thumbnails"), Captured);

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_SpawnCatalog.h

@@ -14,7 +14,7 @@ struct FPS_Editor_SpawnEntry
 	GENERATED_BODY()
 
 	/** The Blueprint class to spawn. Must have a PS_Editor_SpawnableComponent for name/category. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	TSubclassOf<AActor> ActorClass;
 };
 
@@ -34,12 +34,12 @@ class PS_EDITOR_API UPS_Editor_SpawnCatalog : public UPrimaryDataAsset
 
 public:
 	/** List of spawnable actors. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	TArray<FPS_Editor_SpawnEntry> Entries;
 
 #if WITH_EDITOR
 	/** Captures UE-generated thumbnails for all Blueprints in the catalog and assigns them to their SpawnableComponents. */
-	UFUNCTION(CallInEditor, Category = "ASTERION|PS_Editor")
+	UFUNCTION(CallInEditor, Category = "PS_Editor")
 	void CaptureAllThumbnails();
 #endif
 };
@@ -55,18 +55,18 @@ struct FPS_Editor_BaseLevelEntry
 	GENERATED_BODY()
 
 	/** Display name shown in the editor UI and used for scene filtering. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	FString DisplayName;
 
 	/**
 	 * Full map path used for OpenLevel and sublevel loading.
 	 * Example: "/Game/Maps/Warehouse"
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	FString MapPath;
 
 	/** Thumbnail image shown in the BaseLevel selection popup. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	TObjectPtr<UTexture2D> Thumbnail;
 
 	/**
@@ -75,7 +75,7 @@ struct FPS_Editor_BaseLevelEntry
 	 * but not automatically loaded when the base level is a sublevel itself.
 	 * Full map paths, e.g. "/Game/Maps/Warehouse_Lighting"
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	TArray<FString> AdditionalSublevels;
 
 	/**
@@ -83,7 +83,7 @@ struct FPS_Editor_BaseLevelEntry
 	 * Their entries are merged with the global catalogs (MasterCatalog::Catalogs).
 	 * Empty = only global catalogs are shown.
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	TArray<TObjectPtr<UPS_Editor_SpawnCatalog>> Catalogs;
 
 	/**
@@ -92,7 +92,7 @@ struct FPS_Editor_BaseLevelEntry
 	 * are, the first one wins; if none is, scenarios without a base level keep whatever
 	 * sublevel is currently loaded.
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	bool bIsDefault = false;
 };
 
@@ -108,7 +108,7 @@ class PS_EDITOR_API UPS_Editor_MasterCatalog : public UPrimaryDataAsset
 
 public:
 	/** Sub-catalogs to load. Each one contributes its entries to the runtime spawn UI. */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	TArray<TObjectPtr<UPS_Editor_SpawnCatalog>> Catalogs;
 
 	/**
@@ -116,6 +116,18 @@ public:
 	 * DisplayName is used for UI display and scene filtering.
 	 * MapPath is the full package path for OpenLevel (e.g. "/Game/Maps/Warehouse").
 	 */
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
 	TArray<FPS_Editor_BaseLevelEntry> BaseLevels;
+
+	/**
+	 * Optional project-specific enum used to categorize scenarios. The runtime editor's
+	 * "Scenario Type" dropdown (Settings popup) reads this enum to populate its choices.
+	 * The picked value is saved per-scenario as a uint8 (index into the enum) and exposed
+	 * at runtime via UPS_Editor_GameInstanceSubsystem::PendingScenarioType — the gameplay
+	 * GameMode reads it (Byte to Enum) and dispatches its scenario-type-specific logic.
+	 *
+	 * Leave null if your project doesn't use scenario typing — the dropdown is hidden.
+	 */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS_Editor")
+	TObjectPtr<UEnum> ScenarioTypeEnum;
 };

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_SpawnManager.cpp

@@ -5,8 +5,13 @@
 #include "PS_Editor_UndoManager.h"
 #include "PS_Editor_PlayerController.h"
 #include "PS_Editor_TimelineSubsystem.h"
+#include "PS_Editor_GroundSnap.h"
+#include "PS_Editor_NavUtils.h"
+#include "PS_Editor_MandatoryAnchor.h"
+#include "PS_Editor_FloorCutManager.h"
 #include "AIController.h"
 #include "BrainComponent.h"
+#include "EngineUtils.h"
 #include "GameFramework/PlayerController.h"
 #include "GameFramework/Character.h"
 #include "GameFramework/CharacterMovementComponent.h"
@@ -90,11 +95,7 @@ void UPS_Editor_SpawnManager::AddCatalog(UPS_Editor_SpawnCatalog* InCatalog)
 
 		Resolved.Category = SpawnComp ? SpawnComp->Category : TEXT("Default");
 		Resolved.Thumbnail = SpawnComp ? SpawnComp->Thumbnail : nullptr;
-
+		Resolved.bIsMandatory = SpawnComp ? SpawnComp->bIsMandatory : false;
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Resolved '%s' - SpawnComp=%s, Thumbnail=%s"),
-			*Resolved.DisplayName,
-			SpawnComp ? TEXT("found") : TEXT("null"),
-			Resolved.Thumbnail ? *Resolved.Thumbnail->GetPathName() : TEXT("null"));
 
 		ResolvedEntries.Add(Resolved);
 	}
@@ -129,7 +130,13 @@ AActor* UPS_Editor_SpawnManager::SpawnFromCatalogAtLocation(int32 Index, FVector
 	}
 
 	FActorSpawnParameters SpawnParams;
-	SpawnParams.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AdjustIfPossibleButAlwaysSpawn;
+	// AlwaysSpawn (instead of AdjustIfPossibleButAlwaysSpawn) so UE doesn't push the actor
+	// upward when its bounds overlap the ground at spawn time — our SnapActorToGround call
+	// below is the authoritative ground placement step, and it uses collision-only bounds
+	// which correctly ignore non-collidable attached meshes (weapons, child actors).
+	// With the old override, a character with a weapon dangling below the capsule could
+	// be shoved high by the auto-adjust, leaving it stuck in the air.
+	SpawnParams.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;
 
 	AActor* SpawnedActor = PC->GetWorld()->SpawnActor<AActor>(Entry.ActorClass, WorldLocation, FRotator::ZeroRotator, SpawnParams);
 	if (!SpawnedActor)
@@ -159,27 +166,22 @@ AActor* UPS_Editor_SpawnManager::SpawnFromCatalogAtLocation(int32 Index, FVector
 	SpawnedActors.Add(SpawnedActor);
 	RegisterSpawnedActorId(PC->GetWorld(), SpawnedActor);
 
-	// Auto-snap to ground if configured
+	// Catalogue spawns are always a deliberate user placement, so always snap to ground.
+	// Previously gated on SpawnableComponent::bAutoSnapToGround — that flag is preserved
+	// as the gameplay-spawn hint (for SceneLoader / runtime spawning) but here we want
+	// consistent placement regardless of BP configuration. If the actor genuinely shouldn't
+	// touch the ground, the user can move it with the gizmo after spawning.
 	UPS_Editor_SpawnableComponent* SpawnComp = SpawnedActor->FindComponentByClass<UPS_Editor_SpawnableComponent>();
-	if (SpawnComp && SpawnComp->bAutoSnapToGround && PC->GetWorld())
+	if (PC->GetWorld())
 	{
-		FVector Origin, Extent;
+		TArray<AActor*> ExtraIgnored;
-		SpawnedActor->GetActorBounds(false, Origin, Extent);
+		if (APawn* Pwn = PC->GetPawn()) ExtraIgnored.Add(Pwn);
-		float BottomOffset = Extent.Z + SpawnComp->GroundOffset;
 
-		const FVector Start = SpawnedActor->GetActorLocation();
+		FVector SnappedLoc;
-		const FVector End = Start - FVector::UpVector * 100000.0f;
+		if (PS_Editor_GroundSnap::SnapActorToGround(SpawnedActor, SnappedLoc,
-
+			/*OverheadRaise*/ 50.0f, /*MaxDistance*/ 50000.0f, ExtraIgnored))
-		FHitResult Hit;
-		FCollisionQueryParams SnapParams;
-		SnapParams.AddIgnoredActor(SpawnedActor);
-		SnapParams.AddIgnoredActor(PC->GetPawn());
-
-		if (PC->GetWorld()->LineTraceSingleByChannel(Hit, Start, End, ECC_Camera, SnapParams))
 		{
-			FVector NewLoc = Hit.ImpactPoint;
+			SpawnedActor->SetActorLocation(SnappedLoc);
-			NewLoc.Z += BottomOffset;
-			SpawnedActor->SetActorLocation(NewLoc);
 		}
 	}
 
@@ -273,23 +275,14 @@ FVector UPS_Editor_SpawnManager::ComputeSpawnLocation() const
 	FRotator CameraRotation;
 	PC->GetPlayerViewPoint(CameraLocation, CameraRotation);
 
-	const FVector Direction = CameraRotation.Vector();
+	// Unified placement: camera ray first, and if the camera is pointing at the sky / empty
-	const float MaxDistance = 5000.0f;
+	// space, fall back to a downward trace from a point in front of the camera so the spawn
-	const float DefaultDistance = 500.0f;
+	// still lands on ground. Avoids the "aim up, object hovers in the sky" bug.
-	const float SurfaceOffset = 5.0f;
+	TArray<AActor*> Ignored;
+	if (APawn* Pwn = PC->GetPawn()) Ignored.Add(Pwn);
 
-	FHitResult Hit;
+	return PS_Editor_GroundSnap::ProjectCameraRayToGround(PC->GetWorld(), CameraLocation,
-	FCollisionQueryParams Params;
+		CameraRotation.Vector(), Ignored);
-	Params.AddIgnoredActor(PC->GetPawn());
-
-	if (PC->GetWorld()->LineTraceSingleByChannel(Hit, CameraLocation, CameraLocation + Direction * MaxDistance, ECC_Visibility, Params))
-	{
-		// Hit something — place at impact point, slightly offset along the surface normal
-		return Hit.ImpactPoint + Hit.ImpactNormal * SurfaceOffset;
-	}
-
-	// Nothing hit — fallback to default distance
-	return CameraLocation + Direction * DefaultDistance;
 }
 
 AActor* UPS_Editor_SpawnManager::SpawnActorDirect(UClass* ActorClass, FVector Location, FRotator Rotation, FVector Scale)
@@ -318,6 +311,19 @@ AActor* UPS_Editor_SpawnManager::SpawnActorDirect(UClass* ActorClass, FVector Lo
 	SpawnedActors.Add(SpawnedActor);
 	RegisterSpawnedActorId(PC->GetWorld(), SpawnedActor);
 
+	// If the editor's floor-cut is active, evaluate the new actor against it so it doesn't
+	// appear floating above a "hidden" floor.
+	if (UWorld* W = PC->GetWorld())
+	{
+		if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+		{
+			if (FC->IsEnabled())
+			{
+				FC->OnActorSpawned(SpawnedActor);
+			}
+		}
+	}
+
 	return SpawnedActor;
 }
 
@@ -343,6 +349,17 @@ void UPS_Editor_SpawnManager::TrackSpawnedActor(AActor* Actor)
 		if (APlayerController* PC = OwnerPC.Get())
 		{
 			RegisterSpawnedActorId(PC->GetWorld(), Actor);
+			// Re-evaluate against the floor cut (duplicate / paste paths land here).
+			if (UWorld* W = PC->GetWorld())
+			{
+				if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+				{
+					if (FC->IsEnabled())
+					{
+						FC->OnActorSpawned(Actor);
+					}
+				}
+			}
 		}
 	}
 }
@@ -430,7 +447,6 @@ AActor* UPS_Editor_SpawnManager::RespawnActorWithProperties(AActor* OldActor, co
 			if (Prop)
 			{
 				Prop->ImportText_InContainer(*Pair.Value, Target, Target, PPF_None);
-				UE_LOG(LogTemp, Log, TEXT("PS_Editor: Respawn apply [%s] = '%s' on %s"), *Pair.Key, *Pair.Value, *Target->GetName());
 			}
 		}
 	}
@@ -476,6 +492,111 @@ void UPS_Editor_SpawnManager::NotifyEditorModeChanged(bool bIsEditing)
 	}
 }
 
+bool UPS_Editor_SpawnManager::IsActorDeletable(const AActor* Actor) const
+{
+	if (!Actor) return true;
+	const UPS_Editor_SpawnableComponent* SpawnComp = Actor->FindComponentByClass<UPS_Editor_SpawnableComponent>();
+	return !(SpawnComp && SpawnComp->bIsMandatory);
+}
+
+void UPS_Editor_SpawnManager::EnsureMandatoryActorsPresent()
+{
+	APlayerController* PC = OwnerPC.Get();
+	UWorld* World = PC ? PC->GetWorld() : nullptr;
+	if (!World) return;
+
+	// Diagnostic: count how many catalog entries are flagged mandatory. If zero, the user
+	// likely hasn't restarted PIE since marking the BP — Live Coding doesn't re-resolve the
+	// catalog, so cached bIsMandatory values stay stale. Surface this clearly in the log.
+	int32 MandatoryCount = 0;
+	for (const FPS_Editor_ResolvedEntry& E : ResolvedEntries)
+	{
+		if (E.bIsMandatory) ++MandatoryCount;
+	}
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: EnsureMandatoryActorsPresent — scanning %d catalog entries (%d marked mandatory)"),
+		ResolvedEntries.Num(), MandatoryCount);
+	if (MandatoryCount == 0)
+	{
+		// Nothing to do. Don't bother locating an anchor.
+		return;
+	}
+
+	// 1. Locate the standalone APS_Editor_MandatoryAnchor in the loaded baseLevel. We take
+	//    the first one found. If absent, fall back to world origin (with a warning) so
+	//    mandatory actors still land somewhere reachable.
+	FTransform AnchorXf = FTransform::Identity;
+	bool bAnchorFound = false;
+	for (TActorIterator<APS_Editor_MandatoryAnchor> It(World); It; ++It)
+	{
+		if (APS_Editor_MandatoryAnchor* Anchor = *It)
+		{
+			AnchorXf = Anchor->GetActorTransform();
+			bAnchorFound = true;
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: MandatoryAnchor found at %s"), *AnchorXf.GetLocation().ToString());
+			break;
+		}
+	}
+	if (!bAnchorFound)
+	{
+		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: EnsureMandatoryActorsPresent — no APS_Editor_MandatoryAnchor placed in the baseLevel. Mandatory actors will spawn at world origin."));
+	}
+
+	// 2. For each mandatory class in the catalog: skip if any tracked actor of that class
+	//    already exists, otherwise spawn one at the anchor transform. SpawnActorDirect routes
+	//    through the standard tracking path so the new actor lands in SpawnedActors and gets
+	//    a stable timeline ActorId.
+	int32 SpawnedNow = 0;
+	int32 SkippedExisting = 0;
+	for (const FPS_Editor_ResolvedEntry& Entry : ResolvedEntries)
+	{
+		if (!Entry.bIsMandatory || !Entry.ActorClass) continue;
+
+		// Already present?
+		bool bAlreadyPresent = false;
+		for (const TWeakObjectPtr<AActor>& Weak : SpawnedActors)
+		{
+			AActor* Existing = Weak.Get();
+			if (Existing && Existing->IsA(Entry.ActorClass))
+			{
+				bAlreadyPresent = true;
+				break;
+			}
+		}
+		if (bAlreadyPresent)
+		{
+			++SkippedExisting;
+			continue;
+		}
+
+		AActor* NewActor = SpawnActorDirect(Entry.ActorClass, AnchorXf.GetLocation(),
+			AnchorXf.Rotator(), AnchorXf.GetScale3D());
+		if (NewActor)
+		{
+			++SpawnedNow;
+			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Mandatory actor auto-spawned: %s at %s"),
+				*Entry.DisplayName, *AnchorXf.GetLocation().ToString());
+
+			// Fire OnPropertiesLoaded so the actor's BP can run its init logic. For loaded
+			// scenes, the SceneLoader/Serializer already fires this after applying JSON
+			// properties; mandatory auto-spawn has no properties to apply, but the actor
+			// still needs the same init hook (e.g. setting up visuals based on defaults).
+			// Without this call, BP code that relies on OnPropertiesLoaded silently doesn't
+			// run for auto-spawned actors → the actor stays in its raw post-BeginPlay state.
+			if (NewActor->GetClass()->ImplementsInterface(UPS_Editor_EditableInterface::StaticClass()))
+			{
+				IPS_Editor_EditableInterface::Execute_OnPropertiesLoaded(NewActor);
+			}
+		}
+		else
+		{
+			UE_LOG(LogTemp, Warning, TEXT("PS_Editor: Failed to spawn mandatory actor %s"), *Entry.DisplayName);
+		}
+	}
+
+	UE_LOG(LogTemp, Log, TEXT("PS_Editor: EnsureMandatoryActorsPresent — done. Spawned=%d, AlreadyPresent=%d"),
+		SpawnedNow, SkippedExisting);
+}
+
 void UPS_Editor_SpawnManager::TickEditorMode(float DeltaTime)
 {
 	for (const TWeakObjectPtr<AActor>& Weak : SpawnedActors)
@@ -487,6 +608,24 @@ void UPS_Editor_SpawnManager::TickEditorMode(float DeltaTime)
 			IPS_Editor_EditableInterface::Execute_OnEditorTick(Actor, DeltaTime);
 		}
 	}
+
+	// Custom navmesh visualization (P key / Settings checkbox). Bypasses UE's nav debug
+	// renderer (which is gated behind UE_ALLOW_NAVMESH_DEBUG_DRAWING_IN_GAME and unusable
+	// on binary engine builds at runtime). Triangulates each ARecastNavMesh and emits
+	// DrawDebugLine calls per edge — works in PIE / Standalone / packaged. The proc-mesh
+	// surface overlay is also (re)built inside DrawNavMeshDebug; on the on→off transition
+	// we explicitly clear the cache so the surface actor is destroyed (DrawDebugLine entries
+	// auto-expire after 1 frame, but the proc-mesh actor needs an explicit teardown).
+	if (bShowNavMesh)
+	{
+		PS_Editor_NavUtils::DrawNavMeshDebug(GetWorld(), DeltaTime);
+		bWasShowingNavMesh = true;
+	}
+	else if (bWasShowingNavMesh)
+	{
+		PS_Editor_NavUtils::ClearNavMeshDebugCache();
+		bWasShowingNavMesh = false;
+	}
 }
 
 TArray<FString> UPS_Editor_SpawnManager::GetCategories() const

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_SpawnManager.h

@@ -24,6 +24,10 @@ struct FPS_Editor_ResolvedEntry
 
 	UPROPERTY()
 	TObjectPtr<UTexture2D> Thumbnail;
+
+	/** Cached from UPS_Editor_SpawnableComponent::bIsMandatory at catalog resolution time.
+	 *  Mandatory entries are auto-spawned on new-scene/load and hidden from the catalog UI. */
+	bool bIsMandatory = false;
 };
 
 /**
@@ -75,6 +79,46 @@ public:
 	/** Notify all spawned actors that implement IPS_Editor_EditableInterface of editor mode change. */
 	void NotifyEditorModeChanged(bool bIsEditing);
 
+	/**
+	 * Walk the catalog, and for every class flagged bIsMandatory that has no instance currently
+	 * tracked in SpawnedActors, spawn one at the world's APS_Editor_CameraStart::MandatorySpawnAnchor
+	 * (or world origin if none found). Idempotent — calling repeatedly is safe; missing instances
+	 * are added, existing ones are left untouched.
+	 *
+	 * Called from SceneSerializer::ClearScene (new scene) and SceneLoader (after JSON load) so
+	 * mandatory actors are guaranteed present whether the user starts fresh or opens a legacy
+	 * save that predates the mandatory flag.
+	 */
+	void EnsureMandatoryActorsPresent();
+
+	/** Returns false if Actor has a UPS_Editor_SpawnableComponent with bIsMandatory==true.
+	 *  Used by the delete code path (Pawn::HandleDelete) to skip mandatory actors silently. */
+	bool IsActorDeletable(const AActor* Actor) const;
+
+	// ---- Per-scenario settings (persisted in JSON) ----
+
+	/** If true, switch the level's RecastNavMesh to Dynamic runtime generation when this
+	 *  scenario is loaded — both in editor and gameplay. False = keep cooked Static nav.
+	 *  Persisted in the scenario JSON; default false. */
+	bool bUseDynamicNavigation = false;
+
+	/** Project-specific scenario type as uint8 (index into MasterCatalog::ScenarioTypeEnum).
+	 *  Set via the Settings popup dropdown, persisted in the scenario JSON, pushed into
+	 *  PS_Editor_GameInstanceSubsystem::PendingScenarioType at Play click for gameplay
+	 *  GameMode to consume. Default 0 (first enum entry). */
+	uint8 ScenarioType = 0;
+
+	// ---- Session-only UI preferences (NOT persisted) ----
+
+	/** If true, the navmesh is rendered at runtime (mimics the editor's P key). Personal
+	 *  visualization preference, never saved with the scenario. */
+	bool bShowNavMesh = false;
+
+	/** Tracks the previous tick's bShowNavMesh state so TickEditorMode can detect the
+	 *  on→off transition and tear down the proc-mesh surface actor that DrawNavMeshDebug
+	 *  spawned. Without this, the surface would stay visible after the user toggled it off. */
+	bool bWasShowingNavMesh = false;
+
 	/** Tick all spawned actors that implement IPS_Editor_EditableInterface. */
 	void TickEditorMode(float DeltaTime);
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_SpawnableComponent.h

@@ -9,7 +9,7 @@
  * Marker component for Blueprints that can be spawned via the PS_Editor catalogue.
  * Add this component to any Blueprint to make it appear in the runtime spawn catalogue.
  */
-UCLASS(ClassGroup = "ASTERION|PS Editor", meta = (BlueprintSpawnableComponent, DisplayName = "PS Editor Spawnable"))
+UCLASS(ClassGroup = "PS Editor", meta = (BlueprintSpawnableComponent, DisplayName = "PS Editor Spawnable"))
 class PS_EDITOR_API UPS_Editor_SpawnableComponent : public UActorComponent
 {
 	GENERATED_BODY()
@@ -54,6 +54,15 @@ public:
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Spawnable")
 	bool bPreload = false;
 
+	/** If true, this actor class is mandatory for any scenario:
+	 *   - Auto-spawned on "New Scene" (one instance, at the MandatorySpawnAnchor of the
+	 *     baseLevel's APS_Editor_CameraStart, falling back to world origin)
+	 *   - On scene load, if missing, auto-added (handles legacy saves cleanly)
+	 *   - Cannot be deleted by the user (delete is silently refused with a warning log)
+	 *   - Hidden from the catalog (you can't add a 2nd instance) */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Spawnable")
+	bool bIsMandatory = false;
+
 	// ---- Runtime-only: saved movement/rotation settings before editor override ----
 	// Set when the editor disables AI/rotation overrides, restored on StartSimulation.
 	bool bSavedMovementState = false;

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spline/PS_Editor_SplineActor.cpp

@@ -5,7 +5,9 @@
 #include "ProceduralMeshComponent.h"
 #include "Components/StaticMeshComponent.h"
 #include "Engine/StaticMesh.h"
+#include "Materials/MaterialInterface.h"
 #include "Materials/MaterialInstanceDynamic.h"
+#include "UObject/ConstructorHelpers.h"
 
 APS_Editor_SplineActor::APS_Editor_SplineActor()
 {
@@ -50,25 +52,46 @@ APS_Editor_SplineActor::APS_Editor_SplineActor()
 	EditableComp->EditableProperties.Add({FName(TEXT("SplineColor"))});
 	EditableComp->EditableProperties.Add({FName(TEXT("SplineSelectedColor"))});
 	EditableComp->EditableProperties.Add({FName(TEXT("SplineTag"))});
+
+	// Hard-ref plugin + engine assets at CDO-construction time so the cooker follows them
+	// into packaged builds. Replaces the old runtime LoadObject<> soft-string paths.
+	static ConstructorHelpers::FObjectFinder<UMaterialInterface> GizmoBaseMatFinder(
+		TEXT("/PS_Editor/M_PS_Editor_Gizmo.M_PS_Editor_Gizmo"));
+	if (GizmoBaseMatFinder.Succeeded())
+	{
+		GizmoBaseMaterial = GizmoBaseMatFinder.Object;
+	}
+
+	static ConstructorHelpers::FObjectFinder<UMaterialInterface> SplineLineMatFinder(
+		TEXT("/PS_Editor/M_PS_Editor_SplineLine.M_PS_Editor_SplineLine"));
+	if (SplineLineMatFinder.Succeeded())
+	{
+		SplineLineMaterial = SplineLineMatFinder.Object;
+	}
+
+	static ConstructorHelpers::FObjectFinder<UStaticMesh> CubeFinder(
+		TEXT("/Engine/BasicShapes/Cube.Cube"));
+	if (CubeFinder.Succeeded())
+	{
+		CenterCubeMesh = CubeFinder.Object;
+	}
+
+	static ConstructorHelpers::FObjectFinder<UStaticMesh> SphereFinder(
+		TEXT("/Engine/BasicShapes/Sphere.Sphere"));
+	if (SphereFinder.Succeeded())
+	{
+		HandleSphereMesh = SphereFinder.Object;
+	}
 }
 
 void APS_Editor_SplineActor::BeginPlay()
 {
 	Super::BeginPlay();
 
-	// Gizmo material (no depth test, renders on top) for handles and selected state
+	// GizmoBaseMaterial / SplineLineMaterial / meshes are resolved in the ctor via
-	UMaterialInterface* GizmoMat = LoadObject<UMaterialInterface>(
+	// ConstructorHelpers — hard cook references, available here.
-		nullptr, TEXT("/PS_Editor/M_PS_Editor_Gizmo.M_PS_Editor_Gizmo"));
+	UMaterialInterface* GizmoMat = GizmoBaseMaterial.Get();
-
+	UMaterialInterface* SplineLineMat = SplineLineMaterial.Get();
-	// Auto-generated opaque unlit material (depth tested) for spline line
-	UMaterialInterface* SplineLineMat = LoadObject<UMaterialInterface>(
-		nullptr, TEXT("/PS_Editor/M_PS_Editor_SplineLine.M_PS_Editor_SplineLine"));
-
-	if (!SplineLineMat)
-	{
-		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: M_PS_Editor_SplineLine not found, trying without double name..."));
-		SplineLineMat = LoadObject<UMaterialInterface>(nullptr, TEXT("/PS_Editor/M_PS_Editor_SplineLine"));
-	}
 
 	// Spline line: normal depth-tested material (uses SplineColor property)
 	if (SplineLineMat)
@@ -102,10 +125,9 @@ void APS_Editor_SplineActor::BeginPlay()
 	CenterCube = NewObject<UStaticMeshComponent>(this);
 	CenterCube->SetupAttachment(GetRootComponent());
 	CenterCube->RegisterComponent();
-	UStaticMesh* CubeMesh = LoadObject<UStaticMesh>(nullptr, TEXT("/Engine/BasicShapes/Cube.Cube"));
+	if (CenterCubeMesh)
-	if (CubeMesh)
 	{
-		CenterCube->SetStaticMesh(CubeMesh);
+		CenterCube->SetStaticMesh(CenterCubeMesh);
 	}
 	CenterCube->SetWorldScale3D(FVector(CenterCubeScale));
 	CenterCube->SetCollisionEnabled(ECollisionEnabled::QueryOnly);
@@ -310,11 +332,10 @@ UStaticMeshComponent* APS_Editor_SplineActor::CreatePointHandle(const FVector& W
 	Handle->SetupAttachment(HandleRoot);
 	Handle->RegisterComponent();
 
-	// Load sphere mesh
+	// HandleSphereMesh resolved via ConstructorHelpers (hard cook ref).
-	UStaticMesh* SphereMesh = LoadObject<UStaticMesh>(nullptr, TEXT("/Engine/BasicShapes/Sphere.Sphere"));
+	if (HandleSphereMesh)
-	if (SphereMesh)
 	{
-		Handle->SetStaticMesh(SphereMesh);
+		Handle->SetStaticMesh(HandleSphereMesh);
 	}
 
 	Handle->SetWorldLocation(WorldPosition);

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spline/PS_Editor_SplineActor.h

@@ -10,6 +10,8 @@ class USplineComponent;
 class UProceduralMeshComponent;
 class UPS_Editor_SpawnableComponent;
 class UPS_Editor_EditableComponent;
+class UMaterialInterface;
+class UStaticMesh;
 
 /**
  * Runtime spline actor for path/route editing in PS_Editor.
@@ -29,7 +31,7 @@ public:
 	virtual int32 GetCurrentPointCount() const override { return GetNumPoints(); }
 
 	/** Get the underlying USplineComponent (for AI path following, etc.). */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Spline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	USplineComponent* GetSplineComponent() const { return SplineComp; }
 
 	/** Spline display color (override in Blueprint subclasses for variants). */
@@ -73,7 +75,7 @@ public:
 	virtual void UpdateVisualization() override;
 
 	/** Re-apply SplineColor to materials (call after changing SplineColor at runtime). */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Spline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	virtual void UpdateSplineMaterials() override;
 
 	// ---- Handle interaction ----
@@ -166,6 +168,23 @@ private:
 	UPROPERTY()
 	TObjectPtr<UMaterialInstanceDynamic> CenterCubeMat;
 
+	// ---- Hard-ref source assets (cooked into packaged builds via ConstructorHelpers) ----
+
+	/** Gizmo base material for spline handles / selected state (renders on top). */
+	UPROPERTY()
+	TObjectPtr<UMaterialInterface> GizmoBaseMaterial;
+
+	/** Depth-tested material for the normal spline line. */
+	UPROPERTY()
+	TObjectPtr<UMaterialInterface> SplineLineMaterial;
+
+	/** Engine basic shapes used for the center cube and point handles. */
+	UPROPERTY()
+	TObjectPtr<UStaticMesh> CenterCubeMesh;
+
+	UPROPERTY()
+	TObjectPtr<UStaticMesh> HandleSphereMesh;
+
 	UPROPERTY(VisibleAnywhere)
 	TObjectPtr<UPS_Editor_SpawnableComponent> SpawnableComp;
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/Timeline/PS_Editor_TimelineSubsystem.cpp

@@ -194,20 +194,16 @@ void UPS_Editor_TimelineSubsystem::CaptureBaselinesForAllMissingTracks()
 
 void UPS_Editor_TimelineSubsystem::RestoreBaseline()
 {
-	if (PrePlayBaseline.Num() == 0) return;
-
 	// Server-only write path (same guard as ApplyValuesAtTime).
 	if (UWorld* World = GetWorld())
 	{
 		if (World->GetNetMode() == NM_Client) return;
 	}
 
+	const float ZeroEpsilon = 0.0001f;
+
 	for (const FPS_Editor_TimelineTrack& Track : Data.Tracks)
 	{
-		const TPair<FGuid, FName> Key(Track.ActorId, Track.PropertyPath);
-		const FString* BaselineValue = PrePlayBaseline.Find(Key);
-		if (!BaselineValue) continue;
-
 		AActor* Actor = FindActorById(Track.ActorId);
 		if (!Actor) continue;
 		UObject* Target = nullptr;
@@ -215,7 +211,39 @@ void UPS_Editor_TimelineSubsystem::RestoreBaseline()
 		ResolveTarget(Actor, Track.PropertyPath, Target, Prop);
 		if (!Target || !Prop) continue;
 
-		Prop->ImportText_InContainer(**BaselineValue, Target, Target, PPF_None);
+		// Pick the value to restore:
+		//   - If the user placed a key at (or before) t=0 → use that key's value. This
+		//     matches the natural mental model where a key at t=0 sets the timeline's
+		//     starting state — and lets the user adjust it just by re-keying at t=0
+		//     (otherwise Stop would keep snapping back to the captured pre-animation
+		//     baseline forever, ignoring their edits).
+		//   - Otherwise fall back to the captured pre-animation baseline so Stop still
+		//     undoes whatever the timeline pushed (relevant for tracks whose first key
+		//     is past t=0, e.g. a property that only changes mid-timeline).
+		const FString* RestoreValue = nullptr;
+		FString KeyZeroValue;
+		for (const FPS_Editor_TimelineKey& K : Track.Keys)
+		{
+			if (K.Time <= ZeroEpsilon)
+			{
+				KeyZeroValue = K.Value;
+				RestoreValue = &KeyZeroValue;
+				// Continue scanning in case there are several keys at t≈0 — the LAST one wins
+				// (matches sort order: later same-time entries override earlier ones).
+			}
+			else
+			{
+				break; // keys are sorted by time; no need to look past t>0
+			}
+		}
+		if (!RestoreValue)
+		{
+			const TPair<FGuid, FName> BaselineKey(Track.ActorId, Track.PropertyPath);
+			RestoreValue = PrePlayBaseline.Find(BaselineKey);
+		}
+		if (!RestoreValue) continue;
+
+		Prop->ImportText_InContainer(**RestoreValue, Target, Target, PPF_None);
 		if (UActorComponent* AsComp = Cast<UActorComponent>(Target))
 		{
 			AsComp->MarkRenderStateDirty();
@@ -234,15 +262,40 @@ void UPS_Editor_TimelineSubsystem::RestoreBaseline()
 		}
 	}
 
-	// Don't clear the map — a subsequent Stop (or Restart) must still restore the same baseline.
+	// Don't clear PrePlayBaseline — subsequent Stops without a t=0 key still need it.
 	// SetData/Clear are the only resetters.
 }
 
 void UPS_Editor_TimelineSubsystem::Restart()
 {
-	// Rewind + replay from the start. Done in two steps so simulation transforms are restored
+	// Rewind + replay from the start.
-	// by Stop() before Play() re-enables AI, giving a clean "from the beginning" rerun.
+	//
-	Stop();
+	// We can't just call Stop() then Play() because Stop() goes through
+	// PlayerController::RequestStopSimulation which DEFERS the actual StopSimulation by
+	// 500ms (BT grace period). The Play() call right after cancels that pending timer
+	// AND re-enters StartSimulation early (bSimulating still true), so transforms are
+	// never restored — characters stay at their current position instead of rewinding.
+	//
+	// Fix: do the full reset synchronously here. Fire OnEditorBeforeSimulateStop (via
+	// RequestStopSimulation(bImmediate=true) so BP behaviour-reset hooks still run),
+	// then immediately StopSimulation (which restores transforms + fires
+	// OnEditorSimulateStop), then Play() to capture the rewound transforms and restart
+	// AI from the clean state.
+	bIsPlaying = false;
+	CurrentTime = 0.f;
+	LastAppliedValues.Empty();
+	LastAppliedValues.SetNum(Data.Tracks.Num());
+
+	RestoreBaseline();
+
+	if (APS_Editor_PlayerController* EditorPC = FindEditorPC(GetWorld()))
+	{
+		if (EditorPC->IsSimulating())
+		{
+			EditorPC->RequestStopSimulation(/*bImmediate=*/ true);
+		}
+	}
+
 	Play();
 }
 
@@ -300,6 +353,10 @@ void UPS_Editor_TimelineSubsystem::Clear()
 	bIsPlaying = false;
 	LastAppliedValues.Empty();
 	PrePlayBaseline.Reset();
+	// Drop the old ActorIds — the previous scenario's actors have been destroyed and the
+	// weak references are now stale. Keeping them around confuses FindActorById when the
+	// next scenario happens to reuse the same FGuid (it can return a stale null entry).
+	ActorIds.Reset();
 	OnTimelineChanged.Broadcast();
 }
 
@@ -317,6 +374,14 @@ static int32 FindTrack(const FPS_Editor_TimelineData& Data, const FGuid& ActorId
 	return INDEX_NONE;
 }
 
+bool UPS_Editor_TimelineSubsystem::IsPropertyTracked(AActor* Actor, const FName& PropertyPath) const
+{
+	if (!Actor) return false;
+	const FGuid ActorId = FindActorId(Actor);
+	if (!ActorId.IsValid()) return false;
+	return FindTrack(Data, ActorId, PropertyPath) != INDEX_NONE;
+}
+
 bool UPS_Editor_TimelineSubsystem::AddOrUpdateKeyAtCurrentTime(AActor* Actor, const FName& PropertyPath)
 {
 	if (!Actor) return false;
@@ -324,7 +389,7 @@ bool UPS_Editor_TimelineSubsystem::AddOrUpdateKeyAtCurrentTime(AActor* Actor, co
 	const FGuid ActorId = GetOrCreateActorId(Actor);
 	if (!ActorId.IsValid()) return false;
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor Timeline: AddOrUpdateKey — Actor=%s ActorId=%s Prop=%s CurrentTime=%.3f"),
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor Timeline: AddOrUpdateKey — Actor=%s ActorId=%s Prop=%s CurrentTime=%.3f"),
 		*Actor->GetName(), *ActorId.ToString(), *PropertyPath.ToString(), CurrentTime);
 
 	// Resolve property to read current value
@@ -360,6 +425,14 @@ bool UPS_Editor_TimelineSubsystem::AddOrUpdateKeyAtCurrentTime(AActor* Actor, co
 		if (FMath::IsNearlyEqual(Track.Keys[InsertAt].Time, CurrentTime, Epsilon))
 		{
 			Track.Keys[InsertAt].Value = CurrentValue;
+			// Invalidate the per-track applied-value cache so the next ApplyTrackAtTime
+			// re-writes the (possibly different) value instead of skipping based on the
+			// stale cache entry. Otherwise, updating a key with a value the cache happened
+			// to hold from a previous apply would silently revert the property to it.
+			if (LastAppliedValues.IsValidIndex(TrackIndex))
+			{
+				LastAppliedValues[TrackIndex].Empty();
+			}
 			OnTimelineChanged.Broadcast();
 			return true;
 		}
@@ -400,6 +473,12 @@ void UPS_Editor_TimelineSubsystem::RemoveKey(int32 TrackIndex, int32 KeyIndex)
 		Data.Tracks.RemoveAt(TrackIndex);
 		LastAppliedValues.SetNum(Data.Tracks.Num());
 	}
+	else if (LastAppliedValues.IsValidIndex(TrackIndex))
+	{
+		// Track still has keys but its surrounding keys for any time may have changed —
+		// invalidate the cache so the next apply re-writes the correct value.
+		LastAppliedValues[TrackIndex].Empty();
+	}
 	OnTimelineChanged.Broadcast();
 }
 
@@ -409,6 +488,10 @@ void UPS_Editor_TimelineSubsystem::SetKeyInterpolate(int32 TrackIndex, int32 Key
 	FPS_Editor_TimelineTrack& Track = Data.Tracks[TrackIndex];
 	if (!Track.Keys.IsValidIndex(KeyIndex)) return;
 	Track.Keys[KeyIndex].bInterpolate = bInterpolate;
+	if (LastAppliedValues.IsValidIndex(TrackIndex))
+	{
+		LastAppliedValues[TrackIndex].Empty();
+	}
 	OnTimelineChanged.Broadcast();
 }
 
@@ -424,6 +507,10 @@ void UPS_Editor_TimelineSubsystem::SetKeyTime(int32 TrackIndex, int32 KeyIndex,
 	{
 		return A.Time < B.Time;
 	});
+	if (LastAppliedValues.IsValidIndex(TrackIndex))
+	{
+		LastAppliedValues[TrackIndex].Empty();
+	}
 	OnTimelineChanged.Broadcast();
 }
 
@@ -570,11 +657,18 @@ FGuid UPS_Editor_TimelineSubsystem::FindActorId(AActor* Actor) const
 AActor* UPS_Editor_TimelineSubsystem::FindActorById(const FGuid& Id) const
 {
 	if (!Id.IsValid()) return nullptr;
+	// Iterate every pair: the map can legitimately contain stale weak references from a
+	// previous scenario whose actors were destroyed. Without this check the first match on
+	// GUID can return a null key before we reach the live entry, giving "(missing)" after
+	// the second load of the same scenario.
 	for (const TPair<TWeakObjectPtr<AActor>, FGuid>& Pair : ActorIds)
 	{
 		if (Pair.Value == Id)
 		{
-			return Pair.Key.Get();
+			if (AActor* Live = Pair.Key.Get())
+			{
+				return Live;
+			}
 		}
 	}
 	return nullptr;
@@ -583,6 +677,16 @@ AActor* UPS_Editor_TimelineSubsystem::FindActorById(const FGuid& Id) const
 void UPS_Editor_TimelineSubsystem::RegisterActorId(AActor* Actor, const FGuid& Id)
 {
 	if (!Actor || !Id.IsValid()) return;
+	// Prune any stale entries plus any previous entry holding the same GUID (the old actor
+	// has been destroyed and replaced by this one). Keeps the map tight and ensures
+	// FindActorById cannot hit a ghost key with the same GUID.
+	for (auto It = ActorIds.CreateIterator(); It; ++It)
+	{
+		if (!It.Key().IsValid() || It.Value() == Id)
+		{
+			It.RemoveCurrent();
+		}
+	}
 	ActorIds.Add(TWeakObjectPtr<AActor>(Actor), Id);
 }
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/Timeline/PS_Editor_TimelineSubsystem.h

@@ -46,39 +46,39 @@ public:
 	// ---- Playback controls ----
 
 	/** Start / resume playback from CurrentTime. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void Play();
 
 	/** Pause playback, keeping CurrentTime. Simulation keeps running. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void Pause();
 
 	/** Pause playback, rewind to CurrentTime=0, stop simulation and apply t=0 values. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void Stop();
 
 	/** Rewind to t=0 and immediately replay from the start (re-enables simulation). */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void Restart();
 
 	/** Jump to a specific time (seconds, clamped to [0, Duration]). Applies values immediately. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void Seek(float Time);
 
 	/** True while Tick is advancing CurrentTime. */
-	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "PS_Editor")
 	bool IsPlaying() const { return bIsPlaying; }
 
 	/** Get current playback time (seconds). */
-	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "PS_Editor")
 	float GetCurrentTime() const { return CurrentTime; }
 
 	/** Get the configured duration (seconds). */
-	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, BlueprintPure, Category = "PS_Editor")
 	float GetDuration() const { return Data.Duration; }
 
 	/** Change the timeline duration. Values <= 0 are clamped to 0.1. */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	void SetDuration(float NewDuration);
 
 	// ---- Tracks / keys ----
@@ -88,6 +88,11 @@ public:
 
 	const TArray<FPS_Editor_TimelineTrack>& GetTracks() const { return Data.Tracks; }
 
+	/** Returns true if the timeline holds a track for (Actor, PropertyPath). Used by the
+	 *  PlayerController's editable-property snapshot/restore so we don't double-restore
+	 *  properties already handled by the timeline's RestoreBaseline. */
+	bool IsPropertyTracked(AActor* Actor, const FName& PropertyPath) const;
+
 	/**
 	 * Add a key at CurrentTime for (Actor, PropertyPath), reading the actor's current value.
 	 * Creates the track if it doesn't exist. If a key already exists at this time, updates its value.

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/PS_Editor_HUD.h

@@ -35,16 +35,16 @@ class PS_EDITOR_API APS_Editor_HUD : public AHUD
 
 public:
 	/** Which UI implementation to instantiate. Set via Details panel on the HUD Blueprint. */
-	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "ASTERION|PS_Editor|UI")
+	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "PS_Editor")
 	EPS_Editor_UIMode UIMode = EPS_Editor_UIMode::NewSlate;
 
 	/** UMG Widget Blueprint class to spawn when UIMode == UMG.
 	 *  Must derive from UPS_Editor_MainWidget_UMG. */
-	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "ASTERION|PS_Editor|UI", meta = (EditCondition = "UIMode == EPS_Editor_UIMode::UMG"))
+	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "PS_Editor", meta = (EditCondition = "UIMode == EPS_Editor_UIMode::UMG"))
 	TSoftClassPtr<UPS_Editor_MainWidget_UMG> UMGWidgetClass;
 
 	/** Returns the active main editor widget (cast as needed). */
-	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|UI")
+	UFUNCTION(BlueprintCallable, Category = "PS_Editor")
 	UUserWidget* GetMainWidget() const { return MainWidget; }
 
 	/** Backward-compat accessor for the refactored Slate widget (returns nullptr in Legacy/UMG modes). */

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/Widgets/PS_Editor_MainWidget.cpp

@@ -1,6 +1,7 @@
 #include "PS_Editor_MainWidget.h"
 #include "PS_Editor_SelectionManager.h"
 #include "PS_Editor_SpawnManager.h"
+#include "PS_Editor_NavUtils.h"
 #include "PS_Editor_SceneSerializer.h"
 #include "PS_Editor_SceneLoader.h"
 #include "PS_Editor_UndoManager.h"
@@ -31,6 +32,7 @@
 #include "DesktopPlatformModule.h"
 #include "PS_Editor_GameInstanceSubsystem.h"
 #include "PS_Editor_TimelineSubsystem.h"
+#include "PS_Editor_FloorCutManager.h"
 #include "Engine/World.h"
 #include "PS_Editor_UIStyleAsset.h"
 #include "PS_Editor_UIStyle.h"
@@ -500,6 +502,173 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::RebuildWidget()
 				]
 			]
 		]
+		// Settings popup (per-scenario nav option + session navmesh visu)
+		+ SOverlay::Slot()
+		.HAlign(HAlign_Center)
+		.VAlign(VAlign_Center)
+		[
+			SAssignNew(SettingsPopup, SBorder)
+			.Visibility(EVisibility::Collapsed)
+			.BorderImage(BrushGlassStrong.Get())
+			.Padding(FMargin(28.0f, 20.0f))
+			[
+				SNew(SVerticalBox)
+				+ SVerticalBox::Slot().AutoHeight().HAlign(HAlign_Center).Padding(0.0f, 0.0f, 0.0f, 16.0f)
+				[
+					SNew(STextBlock)
+					.Text(FText::FromString(TEXT("Settings")))
+					.Font(FCoreStyle::GetDefaultFontStyle("Bold", 14))
+					.ColorAndOpacity(FLinearColor::White)
+				]
+				+ SVerticalBox::Slot().AutoHeight().Padding(0.0f, 4.0f)
+				[
+					SNew(SHorizontalBox)
+					+ SHorizontalBox::Slot().AutoWidth().VAlign(VAlign_Center).Padding(0.0f, 0.0f, 8.0f, 0.0f)
+					[
+						SNew(SCheckBox)
+						.IsChecked_Lambda([this]() -> ECheckBoxState
+						{
+							if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+							{
+								return SM->bUseDynamicNavigation ? ECheckBoxState::Checked : ECheckBoxState::Unchecked;
+							}
+							return ECheckBoxState::Unchecked;
+						})
+						.OnCheckStateChanged_Lambda([this](ECheckBoxState State) { OnUseDynamicNavigationToggled(State); })
+					]
+					+ SHorizontalBox::Slot().FillWidth(1.0f).VAlign(VAlign_Center)
+					[
+						SNew(SVerticalBox)
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Use Dynamic Navigation")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+							.ColorAndOpacity(FLinearColor::White)
+						]
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Rebuild navmesh at runtime when actors are spawned/moved (saved with scenario).")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Regular", 9))
+							.ColorAndOpacity(FLinearColor(0.7f, 0.7f, 0.7f))
+							.AutoWrapText(true)
+						]
+					]
+				]
+				+ SVerticalBox::Slot().AutoHeight().Padding(0.0f, 8.0f, 0.0f, 4.0f)
+				[
+					SNew(SHorizontalBox)
+					+ SHorizontalBox::Slot().AutoWidth().VAlign(VAlign_Center).Padding(0.0f, 0.0f, 8.0f, 0.0f)
+					[
+						SNew(SCheckBox)
+						.IsChecked_Lambda([this]() -> ECheckBoxState
+						{
+							if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+							{
+								return SM->bShowNavMesh ? ECheckBoxState::Checked : ECheckBoxState::Unchecked;
+							}
+							return ECheckBoxState::Unchecked;
+						})
+						.OnCheckStateChanged_Lambda([this](ECheckBoxState State) { OnShowNavMeshToggled(State); })
+					]
+					+ SHorizontalBox::Slot().FillWidth(1.0f).VAlign(VAlign_Center)
+					[
+						SNew(SVerticalBox)
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Show NavMesh (P)")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+							.ColorAndOpacity(FLinearColor::White)
+						]
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Render the navmesh in green (mimics editor's P key). Personal preference, never saved.")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Regular", 9))
+							.ColorAndOpacity(FLinearColor(0.7f, 0.7f, 0.7f))
+							.AutoWrapText(true)
+						]
+					]
+				]
+				// Scenario Type dropdown — visible only when MasterCatalog::ScenarioTypeEnum is set.
+				+ SVerticalBox::Slot().AutoHeight().Padding(0.0f, 8.0f, 0.0f, 4.0f)
+				[
+					SNew(SHorizontalBox)
+					.Visibility_Lambda([this]() -> EVisibility
+					{
+						if (APS_Editor_PlayerController* PC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+						{
+							if (PC->MasterCatalogAsset && PC->MasterCatalogAsset->ScenarioTypeEnum)
+							{
+								return EVisibility::Visible;
+							}
+						}
+						return EVisibility::Collapsed;
+					})
+					+ SHorizontalBox::Slot().FillWidth(0.45f).VAlign(VAlign_Center)
+					[
+						SNew(SVerticalBox)
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Scenario Type")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+							.ColorAndOpacity(FLinearColor::White)
+						]
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Saved per-scenario; pushed to PendingScenarioType at Play.")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Regular", 9))
+							.ColorAndOpacity(FLinearColor(0.7f, 0.7f, 0.7f))
+							.AutoWrapText(true)
+						]
+					]
+					+ SHorizontalBox::Slot().FillWidth(0.55f).VAlign(VAlign_Center).Padding(8.0f, 0.0f, 0.0f, 0.0f)
+					[
+						SAssignNew(ScenarioTypeCombo, SComboBox<TSharedPtr<FString>>)
+						.OptionsSource(&ScenarioTypeOptions)
+						.OnComboBoxOpening_Lambda([this]() { RefreshScenarioTypeOptions(); })
+						.OnGenerateWidget_Lambda([](TSharedPtr<FString> Item) -> TSharedRef<SWidget>
+						{
+							return SNew(STextBlock).Text(FText::FromString(Item.IsValid() ? *Item : FString()));
+						})
+						.OnSelectionChanged_Lambda([this](TSharedPtr<FString> NewItem, ESelectInfo::Type SelectType)
+						{
+							if (!NewItem.IsValid()) return;
+							const int32 Idx = ScenarioTypeOptions.IndexOfByKey(NewItem);
+							if (Idx == INDEX_NONE) return;
+							if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+							{
+								SM->ScenarioType = (uint8)Idx;
+								bSceneDirty = true;
+							}
+						})
+						[
+							SNew(STextBlock)
+							.Text_Lambda([this]() -> FText
+							{
+								return FText::FromString(GetCurrentScenarioTypeDisplayName());
+							})
+						]
+					]
+				]
+				+ SVerticalBox::Slot().AutoHeight().HAlign(HAlign_Center).Padding(0.0f, 16.0f, 0.0f, 0.0f)
+				[
+					SNew(SButton)
+					.ButtonStyle(StyleFlatButton.Get())
+					.OnClicked_Lambda([this]() -> FReply { CloseSettingsPopup(); return FReply::Handled(); })
+					[
+						SNew(STextBlock)
+						.Text(FText::FromString(TEXT("Close")))
+						.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+						.ColorAndOpacity(FLinearColor::White)
+					]
+				]
+			]
+		]
 
 		// ============= COMMAND PALETTE (modal, Ctrl+K) =============
 		+ SOverlay::Slot()
@@ -724,6 +893,70 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildToolbar()
 					})
 				]
 			]
+			+ SHorizontalBox::Slot().AutoWidth() [ MakeSeparator() ]
+			// ---- Floor cut: editor-only horizontal plane to hide upper floors ----
+			+ SHorizontalBox::Slot().AutoWidth()
+			[
+				MakeToggleButton(EPS_Editor_Icon::Grid, EPS_Editor_Icon::Grid,
+					TAttribute<FString>::CreateLambda([this]() -> FString
+					{
+						UWorld* W = GetWorld();
+						UPS_Editor_FloorCutManager* FC = W ? W->GetSubsystem<UPS_Editor_FloorCutManager>() : nullptr;
+						return (FC && FC->IsEnabled()) ? TEXT("Floor cut On") : TEXT("Floor cut");
+					}),
+					[this]() -> bool
+					{
+						UWorld* W = GetWorld();
+						UPS_Editor_FloorCutManager* FC = W ? W->GetSubsystem<UPS_Editor_FloorCutManager>() : nullptr;
+						return FC && FC->IsEnabled();
+					},
+					[this]()
+					{
+						if (UWorld* W = GetWorld())
+						{
+							if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+							{
+								FC->SetEnabled(!FC->IsEnabled());
+							}
+						}
+					})
+			]
+			+ SHorizontalBox::Slot().AutoWidth().VAlign(VAlign_Center).Padding(4.0f, 0.0f)
+			[
+				SNew(SBox).MinDesiredWidth(120.0f)
+				[
+					SAssignNew(FloorCutSlider, SSlider)
+					.MinValue(0.0f)
+					.MaxValue(1000.0f)
+					.StepSize(10.0f)
+					.MouseUsesStep(true)
+					.Value(200.0f)
+					.ToolTipText(FText::FromString(TEXT("Cut height above MandatoryAnchor (cm) — range 0..1000, step 10")))
+					.OnValueChanged_Lambda([this](float NewValue)
+					{
+						const float Snapped = FMath::RoundToFloat(NewValue / 10.f) * 10.f;
+						if (UWorld* W = GetWorld())
+						{
+							if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+							{
+								FC->SetHeightAboveAnchor(Snapped);
+							}
+						}
+						if (FloorCutValueText.IsValid())
+						{
+							FloorCutValueText->SetText(FText::FromString(FString::Printf(TEXT("%.0f cm"), Snapped)));
+						}
+					})
+				]
+			]
+			+ SHorizontalBox::Slot().AutoWidth().VAlign(VAlign_Center).Padding(2.0f, 0.0f)
+			[
+				SAssignNew(FloorCutValueText, STextBlock)
+				.Text(FText::FromString(TEXT("200 cm")))
+				.Font(FPS_Editor_UIStyle::SmallFont(S))
+				.ColorAndOpacity(FPS_Editor_UIStyle::TextMuted(S))
+				.MinDesiredWidth(48.0f)
+			]
 		];
 }
 
@@ -976,6 +1209,10 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildSceneButtons()
 						if (SceneSerializer.IsValid() && SpawnManager.IsValid())
 						{
 							SceneSerializer->ClearScene(SpawnManager.Get());
+							// Re-spawn mandatory actors immediately after the wipe — this is
+							// the "New Scenario" path, where the user expects a fresh-but-not-empty
+							// scene (mandatory class instances at the MandatoryAnchor).
+							SpawnManager->EnsureMandatoryActorsPresent();
 							bSceneDirty = false;
 							LastKnownSpawnedCount = 0;
 						}
@@ -987,6 +1224,26 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildSceneButtons()
 						.Font(FCoreStyle::GetDefaultFontStyle("Regular", 10))
 					]
 				]
+				// Settings button
+				+ SHorizontalBox::Slot()
+				.AutoWidth()
+				.Padding(4.0f, 0.0f, 0.0f, 0.0f)
+				[
+					SNew(SButton)
+					.ButtonStyle(StyleFlatButton.Get())
+					.ToolTipText(FText::FromString(TEXT("Open scenario / session settings (dynamic nav, navmesh visu).")))
+					.OnClicked_Lambda([this]() -> FReply
+					{
+						OpenSettingsPopup();
+						return FReply::Handled();
+					})
+					[
+						SNew(STextBlock)
+						.Text(FText::FromString(TEXT("Settings")))
+						.Font(FCoreStyle::GetDefaultFontStyle("Regular", 10))
+						.ColorAndOpacity(FLinearColor(0.8f, 0.8f, 0.8f))
+					]
+				]
 				+ SHorizontalBox::Slot()
 				.AutoWidth()
 				.Padding(4.0f, 0.0f, 0.0f, 0.0f)
@@ -1041,7 +1298,8 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildSceneButtons()
 						{
 							if (UPS_Editor_GameInstanceSubsystem* Sub = GI->GetSubsystem<UPS_Editor_GameInstanceSubsystem>())
 							{
-								Sub->SetPendingScenario(SceneName, BaseLevel);
+								const uint8 TypeToSend = SpawnManager.IsValid() ? SpawnManager->ScenarioType : 0;
+								Sub->SetPendingScenario(SceneName, BaseLevel, TypeToSend);
 								Sub->bIsPlayMode = true;
 								if (Sub->EditorMapName.IsEmpty())
 								{
@@ -1159,7 +1417,7 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildSceneButtons()
 									}
 								}
 
-								SceneSerializer->LoadScene(FileName, SpawnManager.Get());
+								SceneSerializer->LoadScenario(FileName, SpawnManager.Get());
 								bSceneDirty = false;
 								if (SaveNameField.IsValid())
 								{
@@ -1418,18 +1676,14 @@ void UPS_Editor_MainWidget::PopulateSceneList()
 						// No base level in the scenario file — try to resolve the default from the catalog.
 						if (!bHasValidBaseLevel && EditorPC->MasterCatalogAsset)
 						{
-							UE_LOG(LogTemp, Log, TEXT("PS_Editor: Scenario '%s' has no base level, searching for default in MasterCatalog (%d entries)"),
+							UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Scenario '%s' has no base level, searching for default in MasterCatalog (%d entries)"),
 								*Name, EditorPC->MasterCatalogAsset->BaseLevels.Num());
 							for (const FPS_Editor_BaseLevelEntry& Entry : EditorPC->MasterCatalogAsset->BaseLevels)
 							{
-								UE_LOG(LogTemp, Log, TEXT("  BaseLevel entry: DisplayName='%s', MapPath='%s', bIsDefault=%d"),
-									*Entry.DisplayName, *Entry.MapPath, Entry.bIsDefault ? 1 : 0);
 								if (Entry.bIsDefault && !Entry.DisplayName.IsEmpty())
 								{
 									SceneLevelName = Entry.DisplayName;
 									bHasValidBaseLevel = BaseLevelPathMap.Contains(SceneLevelName);
-									UE_LOG(LogTemp, Log, TEXT("  -> Picked default '%s' (in PathMap=%d)"),
-										*SceneLevelName, bHasValidBaseLevel ? 1 : 0);
 									break;
 								}
 							}
@@ -1464,7 +1718,7 @@ void UPS_Editor_MainWidget::PopulateSceneList()
 						// current sublevel as-is — don't unload it (avoids empty scenes).
 					}
 
-					SceneSerializer->LoadScene(Name, SpawnManager.Get());
+					SceneSerializer->LoadScenario(Name, SpawnManager.Get());
 					bSceneDirty = false;
 					if (SaveNameField.IsValid())
 					{
@@ -1548,6 +1802,10 @@ void UPS_Editor_MainWidget::PopulateSpawnCatalog()
 	{
 		const FPS_Editor_ResolvedEntry& Entry = Entries[i];
 
+		// Mandatory classes are auto-spawned and singletons — hide them from the catalog so
+		// the user can't add a 2nd instance.
+		if (Entry.bIsMandatory) continue;
+
 		// Category header
 		if (Entry.Category != CurrentCategory)
 		{
@@ -1821,9 +2079,33 @@ void UPS_Editor_MainWidget::RefreshPropertiesFromSelection()
 			bPointSelected = (Pawn->ActiveSplinePointIndex >= 0);
 		}
 
+		// SplinePlacement mode is shared between IPS_Editor_SplineEditable and
+		// IPS_Editor_ChildMovable — show ChildMovable-specific help when the active
+		// placement actor implements the child interface (no point insertion, no Del,
+		// rotation gizmo available via R key).
+		bool bChildMovableActive = false;
+		if (APS_Editor_PlayerController* EditorPC2 = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+		{
+			if (AActor* ActiveActor = EditorPC2->GetActivePlacementActor())
+			{
+				bChildMovableActive = ActiveActor->GetClass()->ImplementsInterface(UPS_Editor_ChildMovable::StaticClass());
+			}
+		}
+
 		if (HelpBarText.IsValid())
+		{
+			if (bChildMovableActive)
 			{
 				if (bPointSelected)
+				{
+					HelpBarText->SetText(FText::FromString(TEXT("CHILDREN: Drag gizmo to move | R: rotate | T: translate | Esc/Done: finish")));
+				}
+				else
+				{
+					HelpBarText->SetText(FText::FromString(TEXT("CHILDREN: Click a child to select | Esc/Done: finish")));
+				}
+			}
+			else if (bPointSelected)
 			{
 				HelpBarText->SetText(FText::FromString(TEXT("SPLINE: Drag gizmo to move | Del: delete point | Click line: insert | Click outside: add | Esc/Done: finish")));
 			}
@@ -1835,7 +2117,8 @@ void UPS_Editor_MainWidget::RefreshPropertiesFromSelection()
 		}
 		if (SplineEditButton.IsValid()) SplineEditButton->SetVisibility(EVisibility::Collapsed);
 		if (ChildEditButton.IsValid()) ChildEditButton->SetVisibility(EVisibility::Collapsed);
-		if (SplineDeletePointButton.IsValid()) SplineDeletePointButton->SetVisibility(bPointSelected ? EVisibility::Visible : EVisibility::Collapsed);
+		// Delete-point button is meaningless for ChildMovable (fixed child set)
+		if (SplineDeletePointButton.IsValid()) SplineDeletePointButton->SetVisibility((bPointSelected && !bChildMovableActive) ? EVisibility::Visible : EVisibility::Collapsed);
 		if (SplineFinishButton.IsValid()) SplineFinishButton->SetVisibility(EVisibility::Visible);
 	}
 	else if (bChildMovableSelected)
@@ -2243,7 +2526,7 @@ void UPS_Editor_MainWidget::RebuildDynamicProperties()
 		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: EditableComponent has 0 properties on %s"), *Actor->GetName());
 		return;
 	}
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Building %d dynamic property rows for %s"), EditComp->EditableProperties.Num(), *Actor->GetName());
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Building %d dynamic property rows for %s"), EditComp->EditableProperties.Num(), *Actor->GetName());
 
 	const FSlateFontInfo LabelFont = FCoreStyle::GetDefaultFontStyle("Regular", 9);
 	const FSlateFontInfo ValueFont = FCoreStyle::GetDefaultFontStyle("Regular", 9);
@@ -2271,8 +2554,6 @@ void UPS_Editor_MainWidget::RebuildDynamicProperties()
 		Row.DisplayName = EditComp->GetDisplayName(Entry.Path);
 		Row.Key = Entry.Path.ToString();
 
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Resolving [%s] comp='%s' prop='%s'"), *Row.Key, *Row.ComponentName, *Row.PropertyName);
-
 		UObject* Target = FindPropertyTarget(Actor, Row.ComponentName);
 		if (!Target)
 		{
@@ -2293,8 +2574,6 @@ void UPS_Editor_MainWidget::RebuildDynamicProperties()
 			UE_LOG(LogTemp, Warning, TEXT("PS_Editor: Property '%s' not found on %s (%s)"), *Row.PropertyName, *Target->GetName(), *Target->GetClass()->GetName());
 			continue;
 		}
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Resolved OK → %s on %s"), *Row.CachedProperty->GetName(), *Target->GetClass()->GetName());
-
 		const int32 RowIndex = DynamicPropertyRows.Num();
 
 		// Label
@@ -2545,7 +2824,7 @@ void UPS_Editor_MainWidget::RebuildDynamicProperties()
 		DynamicPropertyRows.Add(Row);
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Built %d dynamic property row(s)"), DynamicPropertyRows.Num());
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Built %d dynamic property row(s)"), DynamicPropertyRows.Num());
 }
 
 void UPS_Editor_MainWidget::RefreshDynamicPropertyValues()
@@ -2875,7 +3154,7 @@ void UPS_Editor_MainWidget::ApplyPropertyFromUI(int32 RowIndex)
 		if (UFunction* RepFunc = Target->FindFunction(Row.CachedProperty->RepNotifyFunc))
 		{
 			Target->ProcessEvent(RepFunc, nullptr);
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Called %s on %s"), *Row.CachedProperty->RepNotifyFunc.ToString(), *Target->GetName());
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Called %s on %s"), *Row.CachedProperty->RepNotifyFunc.ToString(), *Target->GetName());
 		}
 	}
 
@@ -2902,7 +3181,7 @@ void UPS_Editor_MainWidget::ApplyPropertyFromUI(int32 RowIndex)
 		}
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Property %s changed: %s → %s"), *Row.Key, *OldValue, *NewValue);
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Property %s changed: %s → %s"), *Row.Key, *OldValue, *NewValue);
 
 	// Always notify property changed
 	const bool bImplementsInterface = Actor->GetClass()->ImplementsInterface(UPS_Editor_EditableInterface::StaticClass());
@@ -3182,6 +3461,90 @@ void UPS_Editor_MainWidget::CancelBaseLevelPopup()
 	PendingBaseLevelSelection.Empty();
 }
 
+void UPS_Editor_MainWidget::OpenSettingsPopup()
+{
+	if (SettingsPopup.IsValid())
+	{
+		// Refresh enum-driven options each time the popup opens — covers the case where the
+		// MasterCatalogAsset (or its ScenarioTypeEnum) wasn't set at widget Construct time.
+		RefreshScenarioTypeOptions();
+		SettingsPopup->SetVisibility(EVisibility::Visible);
+	}
+}
+
+void UPS_Editor_MainWidget::RefreshScenarioTypeOptions()
+{
+	ScenarioTypeOptions.Empty();
+	if (APS_Editor_PlayerController* PC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+	{
+		if (PC->MasterCatalogAsset && PC->MasterCatalogAsset->ScenarioTypeEnum)
+		{
+			UEnum* E = PC->MasterCatalogAsset->ScenarioTypeEnum;
+			// NumEnums()-1 to skip the auto-generated _MAX entry on regular UENUMs.
+			// User-defined enums (UUserDefinedEnum) don't have _MAX but the last "MAX" entry
+			// is hidden behind the `bIsHidden` meta — we drop the last one defensively.
+			const int32 Count = FMath::Max(0, E->NumEnums() - 1);
+			for (int32 i = 0; i < Count; ++i)
+			{
+				ScenarioTypeOptions.Add(MakeShared<FString>(E->GetDisplayNameTextByIndex(i).ToString()));
+			}
+		}
+	}
+	if (ScenarioTypeCombo.IsValid())
+	{
+		ScenarioTypeCombo->RefreshOptions();
+	}
+}
+
+FString UPS_Editor_MainWidget::GetCurrentScenarioTypeDisplayName() const
+{
+	if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+	{
+		if (APS_Editor_PlayerController* PC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+		{
+			if (PC->MasterCatalogAsset && PC->MasterCatalogAsset->ScenarioTypeEnum)
+			{
+				UEnum* E = PC->MasterCatalogAsset->ScenarioTypeEnum;
+				const int32 Count = FMath::Max(0, E->NumEnums() - 1);
+				if (SM->ScenarioType < Count)
+				{
+					return E->GetDisplayNameTextByIndex(SM->ScenarioType).ToString();
+				}
+			}
+		}
+	}
+	return FString();
+}
+
+void UPS_Editor_MainWidget::CloseSettingsPopup()
+{
+	if (SettingsPopup.IsValid())
+	{
+		SettingsPopup->SetVisibility(EVisibility::Collapsed);
+	}
+}
+
+void UPS_Editor_MainWidget::OnUseDynamicNavigationToggled(ECheckBoxState State)
+{
+	UPS_Editor_SpawnManager* SM = SpawnManager.Get();
+	if (!SM) return;
+
+	const bool bEnabled = (State == ECheckBoxState::Checked);
+	SM->bUseDynamicNavigation = bEnabled;
+	bSceneDirty = true;
+	PS_Editor_NavUtils::SetDynamicNavigationEnabled(GetWorld(), bEnabled);
+}
+
+void UPS_Editor_MainWidget::OnShowNavMeshToggled(ECheckBoxState State)
+{
+	UPS_Editor_SpawnManager* SM = SpawnManager.Get();
+	if (!SM) return;
+
+	const bool bVisible = (State == ECheckBoxState::Checked);
+	SM->bShowNavMesh = bVisible;
+	PS_Editor_NavUtils::SetNavMeshVisible(GetWorld(), bVisible);
+}
+
 void UPS_Editor_MainWidget::OnCloseClicked()
 {
 	if (CloseConfirmOverlay.IsValid())
@@ -3844,7 +4207,7 @@ void UPS_Editor_MainWidget::RebuildTimelineTracksList()
 						// previously-selected actor (e.g. a spline still in overlay-visible state)
 						// is properly released and its handles/highlight go away.
 						AActor* TrackActor = TS2->FindActorById(Tr.ActorId);
-						UE_LOG(LogTemp, Log, TEXT("PS_Editor: Key click — track=%d key=%d ActorId=%s resolved=%s"),
+						UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Key click — track=%d key=%d ActorId=%s resolved=%s"),
 							CapturedTrack, CapturedKey, *Tr.ActorId.ToString(), TrackActor ? *TrackActor->GetName() : TEXT("null"));
 						if (TrackActor)
 						{

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/Widgets/PS_Editor_MainWidget.h

@@ -107,6 +107,10 @@ private:
 	TSharedPtr<STextBlock> SnapText;
 	TSharedPtr<SEditableTextBox> SnapSizeField;
 
+	// Floor-cut UI (editor-only horizontal plane that hides primitives above AnchorZ+H)
+	TSharedPtr<STextBlock> FloorCutValueText;
+	TSharedPtr<class SSlider> FloorCutSlider;
+
 	// Spawn catalog
 	TSharedPtr<SVerticalBox> SpawnListContainer;
 
@@ -134,6 +138,19 @@ private:
 	void ConfirmBaseLevelSelection();
 	void CancelBaseLevelPopup();
 
+	// Global Settings popup (per-scenario nav option + session-only navmesh visu + scenario type).
+	TSharedPtr<SWidget> SettingsPopup;
+	void OpenSettingsPopup();
+	void CloseSettingsPopup();
+	void OnUseDynamicNavigationToggled(ECheckBoxState State);
+	void OnShowNavMeshToggled(ECheckBoxState State);
+
+	// Scenario type dropdown — populated from MasterCatalog::ScenarioTypeEnum, hidden when null.
+	TArray<TSharedPtr<FString>> ScenarioTypeOptions;
+	TSharedPtr<SComboBox<TSharedPtr<FString>>> ScenarioTypeCombo;
+	void RefreshScenarioTypeOptions();
+	FString GetCurrentScenarioTypeDisplayName() const;
+
 	// Transform fields
 	TSharedPtr<SEditableTextBox> LocX, LocY, LocZ;
 	TSharedPtr<SEditableTextBox> RotX, RotY, RotZ;

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/Widgets/PS_Editor_MainWidget_Legacy.cpp

@@ -1,6 +1,7 @@
 #include "PS_Editor_MainWidget_Legacy.h"
 #include "PS_Editor_SelectionManager.h"
 #include "PS_Editor_SpawnManager.h"
+#include "PS_Editor_NavUtils.h"
 #include "PS_Editor_SceneSerializer.h"
 #include "PS_Editor_SceneLoader.h"
 #include "PS_Editor_UndoManager.h"
@@ -31,6 +32,7 @@
 #include "DesktopPlatformModule.h"
 #include "PS_Editor_GameInstanceSubsystem.h"
 #include "PS_Editor_TimelineSubsystem.h"
+#include "PS_Editor_FloorCutManager.h"
 #include "Engine/World.h"
 
 // Forward declaration — the real definition lives further down with the timeline UI block,
@@ -448,6 +450,187 @@ TSharedRef<SWidget> UPS_Editor_MainWidget_Legacy::RebuildWidget()
 					]
 				]
 			]
+		]
+		// Settings popup (per-scenario nav option + session navmesh visu)
+		+ SOverlay::Slot()
+		.HAlign(HAlign_Center)
+		.VAlign(VAlign_Center)
+		[
+			SAssignNew(SettingsPopup, SBorder)
+			.Visibility(EVisibility::Collapsed)
+			.BorderImage(FCoreStyle::Get().GetBrush("WhiteBrush"))
+			.BorderBackgroundColor(FLinearColor(0.08f, 0.08f, 0.08f, 0.97f))
+			.Padding(FMargin(28.0f, 20.0f))
+			[
+				SNew(SVerticalBox)
+				// Header
+				+ SVerticalBox::Slot().AutoHeight().HAlign(HAlign_Center).Padding(0.0f, 0.0f, 0.0f, 16.0f)
+				[
+					SNew(STextBlock)
+					.Text(FText::FromString(TEXT("Settings")))
+					.Font(FCoreStyle::GetDefaultFontStyle("Bold", 14))
+					.ColorAndOpacity(FLinearColor::White)
+				]
+				// Use Dynamic Navigation (saved per-scenario)
+				+ SVerticalBox::Slot().AutoHeight().Padding(0.0f, 4.0f)
+				[
+					SNew(SHorizontalBox)
+					+ SHorizontalBox::Slot().AutoWidth().VAlign(VAlign_Center).Padding(0.0f, 0.0f, 8.0f, 0.0f)
+					[
+						SNew(SCheckBox)
+						.IsChecked_Lambda([this]() -> ECheckBoxState
+						{
+							if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+							{
+								return SM->bUseDynamicNavigation ? ECheckBoxState::Checked : ECheckBoxState::Unchecked;
+							}
+							return ECheckBoxState::Unchecked;
+						})
+						.OnCheckStateChanged_Lambda([this](ECheckBoxState State)
+						{
+							OnUseDynamicNavigationToggled(State);
+						})
+					]
+					+ SHorizontalBox::Slot().FillWidth(1.0f).VAlign(VAlign_Center)
+					[
+						SNew(SVerticalBox)
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Use Dynamic Navigation")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+							.ColorAndOpacity(FLinearColor::White)
+						]
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Rebuild navmesh at runtime when actors are spawned/moved (saved with scenario).")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Regular", 9))
+							.ColorAndOpacity(FLinearColor(0.7f, 0.7f, 0.7f))
+							.AutoWrapText(true)
+						]
+					]
+				]
+				// Show NavMesh (session-only)
+				+ SVerticalBox::Slot().AutoHeight().Padding(0.0f, 8.0f, 0.0f, 4.0f)
+				[
+					SNew(SHorizontalBox)
+					+ SHorizontalBox::Slot().AutoWidth().VAlign(VAlign_Center).Padding(0.0f, 0.0f, 8.0f, 0.0f)
+					[
+						SNew(SCheckBox)
+						.IsChecked_Lambda([this]() -> ECheckBoxState
+						{
+							if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+							{
+								return SM->bShowNavMesh ? ECheckBoxState::Checked : ECheckBoxState::Unchecked;
+							}
+							return ECheckBoxState::Unchecked;
+						})
+						.OnCheckStateChanged_Lambda([this](ECheckBoxState State)
+						{
+							OnShowNavMeshToggled(State);
+						})
+					]
+					+ SHorizontalBox::Slot().FillWidth(1.0f).VAlign(VAlign_Center)
+					[
+						SNew(SVerticalBox)
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Show NavMesh (P)")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+							.ColorAndOpacity(FLinearColor::White)
+						]
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Render the navmesh in green (mimics editor's P key). Personal preference, never saved.")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Regular", 9))
+							.ColorAndOpacity(FLinearColor(0.7f, 0.7f, 0.7f))
+							.AutoWrapText(true)
+						]
+					]
+				]
+				// Scenario Type dropdown — visible only when MasterCatalog::ScenarioTypeEnum is set.
+				+ SVerticalBox::Slot().AutoHeight().Padding(0.0f, 8.0f, 0.0f, 4.0f)
+				[
+					SNew(SHorizontalBox)
+					.Visibility_Lambda([this]() -> EVisibility
+					{
+						if (APS_Editor_PlayerController* PC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+						{
+							if (PC->MasterCatalogAsset && PC->MasterCatalogAsset->ScenarioTypeEnum)
+							{
+								return EVisibility::Visible;
+							}
+						}
+						return EVisibility::Collapsed;
+					})
+					+ SHorizontalBox::Slot().FillWidth(0.45f).VAlign(VAlign_Center)
+					[
+						SNew(SVerticalBox)
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Scenario Type")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+							.ColorAndOpacity(FLinearColor::White)
+						]
+						+ SVerticalBox::Slot().AutoHeight()
+						[
+							SNew(STextBlock)
+							.Text(FText::FromString(TEXT("Saved per-scenario; pushed to PendingScenarioType at Play.")))
+							.Font(FCoreStyle::GetDefaultFontStyle("Regular", 9))
+							.ColorAndOpacity(FLinearColor(0.7f, 0.7f, 0.7f))
+							.AutoWrapText(true)
+						]
+					]
+					+ SHorizontalBox::Slot().FillWidth(0.55f).VAlign(VAlign_Center).Padding(8.0f, 0.0f, 0.0f, 0.0f)
+					[
+						SAssignNew(ScenarioTypeCombo, SComboBox<TSharedPtr<FString>>)
+						.OptionsSource(&ScenarioTypeOptions)
+						.OnComboBoxOpening_Lambda([this]() { RefreshScenarioTypeOptions(); })
+						.OnGenerateWidget_Lambda([](TSharedPtr<FString> Item) -> TSharedRef<SWidget>
+						{
+							return SNew(STextBlock).Text(FText::FromString(Item.IsValid() ? *Item : FString()));
+						})
+						.OnSelectionChanged_Lambda([this](TSharedPtr<FString> NewItem, ESelectInfo::Type SelectType)
+						{
+							if (!NewItem.IsValid()) return;
+							const int32 Idx = ScenarioTypeOptions.IndexOfByKey(NewItem);
+							if (Idx == INDEX_NONE) return;
+							if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+							{
+								SM->ScenarioType = (uint8)Idx;
+								bSceneDirty = true;
+							}
+						})
+						[
+							SNew(STextBlock)
+							.Text_Lambda([this]() -> FText
+							{
+								return FText::FromString(GetCurrentScenarioTypeDisplayName());
+							})
+						]
+					]
+				]
+				// Close button
+				+ SVerticalBox::Slot().AutoHeight().HAlign(HAlign_Center).Padding(0.0f, 16.0f, 0.0f, 0.0f)
+				[
+					SNew(SButton)
+					.OnClicked_Lambda([this]() -> FReply
+					{
+						CloseSettingsPopup();
+						return FReply::Handled();
+					})
+					[
+						SNew(STextBlock)
+						.Text(FText::FromString(TEXT("Close")))
+						.Font(FCoreStyle::GetDefaultFontStyle("Bold", 11))
+						.ColorAndOpacity(FLinearColor::White)
+					]
+				]
+			]
 		];
 }
 
@@ -558,6 +741,69 @@ TSharedRef<SWidget> UPS_Editor_MainWidget_Legacy::BuildToolbar()
 					})
 				]
 			]
+			// ---- Floor cut: editor-only horizontal plane to hide upper floors ----
+			+ SHorizontalBox::Slot().AutoWidth().Padding(16.0f, 0.0f, 2.0f, 0.0f).VAlign(VAlign_Center)
+			[
+				SNew(SButton)
+				.ToolTipText(FText::FromString(TEXT("Toggle floor cut. Hides primitives whose bounds-min Z is above (Anchor.Z + Height)")))
+				.OnClicked_Lambda([this]() -> FReply
+				{
+					if (UWorld* W = GetWorld())
+					{
+						if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+						{
+							FC->SetEnabled(!FC->IsEnabled());
+							if (FloorCutToggleText.IsValid())
+							{
+								FloorCutToggleText->SetText(FText::FromString(FC->IsEnabled() ? TEXT("Floor cut: On") : TEXT("Floor cut: Off")));
+							}
+						}
+					}
+					return FReply::Handled();
+				})
+				[
+					SAssignNew(FloorCutToggleText, STextBlock)
+					.Text(FText::FromString(TEXT("Floor cut: Off")))
+					.Font(FCoreStyle::GetDefaultFontStyle("Regular", 10))
+				]
+			]
+			+ SHorizontalBox::Slot().AutoWidth().Padding(4.0f, 0.0f).VAlign(VAlign_Center)
+			[
+				SNew(SBox).MinDesiredWidth(120.0f)
+				[
+					SAssignNew(FloorCutSlider, SSlider)
+					.MinValue(0.0f)
+					.MaxValue(1000.0f)
+					.StepSize(10.0f)
+					.MouseUsesStep(true)
+					.Value(200.0f)
+					.ToolTipText(FText::FromString(TEXT("Cut height above MandatoryAnchor (cm) — range 0..1000, step 10")))
+					.OnValueChanged_Lambda([this](float NewValue)
+					{
+						// Snap to 10 cm — SSlider's MouseUsesStep already does this for clicks,
+						// but a drag still emits raw floats, so we re-snap here.
+						const float Snapped = FMath::RoundToFloat(NewValue / 10.f) * 10.f;
+						if (UWorld* W = GetWorld())
+						{
+							if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+							{
+								FC->SetHeightAboveAnchor(Snapped);
+							}
+						}
+						if (FloorCutValueText.IsValid())
+						{
+							FloorCutValueText->SetText(FText::FromString(FString::Printf(TEXT("%.0f cm"), Snapped)));
+						}
+					})
+				]
+			]
+			+ SHorizontalBox::Slot().AutoWidth().Padding(2.0f, 0.0f).VAlign(VAlign_Center)
+			[
+				SAssignNew(FloorCutValueText, STextBlock)
+				.Text(FText::FromString(TEXT("200 cm")))
+				.Font(FCoreStyle::GetDefaultFontStyle("Regular", 9))
+				.MinDesiredWidth(48.0f)
+			]
 		];
 }
 
@@ -805,6 +1051,10 @@ TSharedRef<SWidget> UPS_Editor_MainWidget_Legacy::BuildSceneButtons()
 						if (SceneSerializer.IsValid() && SpawnManager.IsValid())
 						{
 							SceneSerializer->ClearScene(SpawnManager.Get());
+							// Re-spawn mandatory actors immediately after the wipe — this is
+							// the "New Scenario" path, where the user expects a fresh-but-not-empty
+							// scene (mandatory class instances at the MandatoryAnchor).
+							SpawnManager->EnsureMandatoryActorsPresent();
 							bSceneDirty = false;
 							LastKnownSpawnedCount = 0;
 						}
@@ -816,6 +1066,25 @@ TSharedRef<SWidget> UPS_Editor_MainWidget_Legacy::BuildSceneButtons()
 						.Font(FCoreStyle::GetDefaultFontStyle("Regular", 10))
 					]
 				]
+				// Settings button — opens the global Settings popup
+				+ SHorizontalBox::Slot()
+				.AutoWidth()
+				.Padding(4.0f, 0.0f, 0.0f, 0.0f)
+				[
+					SNew(SButton)
+					.ToolTipText(FText::FromString(TEXT("Open scenario / session settings (dynamic nav, navmesh visu).")))
+					.OnClicked_Lambda([this]() -> FReply
+					{
+						OpenSettingsPopup();
+						return FReply::Handled();
+					})
+					[
+						SNew(STextBlock)
+						.Text(FText::FromString(TEXT("Settings")))
+						.Font(FCoreStyle::GetDefaultFontStyle("Regular", 10))
+						.ColorAndOpacity(FLinearColor(0.8f, 0.8f, 0.8f))
+					]
+				]
 				+ SHorizontalBox::Slot()
 				.AutoWidth()
 				.Padding(4.0f, 0.0f, 0.0f, 0.0f)
@@ -869,7 +1138,8 @@ TSharedRef<SWidget> UPS_Editor_MainWidget_Legacy::BuildSceneButtons()
 						{
 							if (UPS_Editor_GameInstanceSubsystem* Sub = GI->GetSubsystem<UPS_Editor_GameInstanceSubsystem>())
 							{
-								Sub->SetPendingScenario(SceneName, BaseLevel);
+								const uint8 TypeToSend = SpawnManager.IsValid() ? SpawnManager->ScenarioType : 0;
+								Sub->SetPendingScenario(SceneName, BaseLevel, TypeToSend);
 								Sub->bIsPlayMode = true;
 								if (Sub->EditorMapName.IsEmpty())
 								{
@@ -986,7 +1256,7 @@ TSharedRef<SWidget> UPS_Editor_MainWidget_Legacy::BuildSceneButtons()
 									}
 								}
 
-								SceneSerializer->LoadScene(FileName, SpawnManager.Get());
+								SceneSerializer->LoadScenario(FileName, SpawnManager.Get());
 								bSceneDirty = false;
 								if (SaveNameField.IsValid())
 								{
@@ -1239,18 +1509,14 @@ void UPS_Editor_MainWidget_Legacy::PopulateSceneList()
 						// No base level in the scenario file — try to resolve the default from the catalog.
 						if (!bHasValidBaseLevel && EditorPC->MasterCatalogAsset)
 						{
-							UE_LOG(LogTemp, Log, TEXT("PS_Editor: Scenario '%s' has no base level, searching for default in MasterCatalog (%d entries)"),
+							UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Scenario '%s' has no base level, searching for default in MasterCatalog (%d entries)"),
 								*Name, EditorPC->MasterCatalogAsset->BaseLevels.Num());
 							for (const FPS_Editor_BaseLevelEntry& Entry : EditorPC->MasterCatalogAsset->BaseLevels)
 							{
-								UE_LOG(LogTemp, Log, TEXT("  BaseLevel entry: DisplayName='%s', MapPath='%s', bIsDefault=%d"),
-									*Entry.DisplayName, *Entry.MapPath, Entry.bIsDefault ? 1 : 0);
 								if (Entry.bIsDefault && !Entry.DisplayName.IsEmpty())
 								{
 									SceneLevelName = Entry.DisplayName;
 									bHasValidBaseLevel = BaseLevelPathMap.Contains(SceneLevelName);
-									UE_LOG(LogTemp, Log, TEXT("  -> Picked default '%s' (in PathMap=%d)"),
-										*SceneLevelName, bHasValidBaseLevel ? 1 : 0);
 									break;
 								}
 							}
@@ -1285,7 +1551,7 @@ void UPS_Editor_MainWidget_Legacy::PopulateSceneList()
 						// current sublevel as-is — don't unload it (avoids empty scenes).
 					}
 
-					SceneSerializer->LoadScene(Name, SpawnManager.Get());
+					SceneSerializer->LoadScenario(Name, SpawnManager.Get());
 					bSceneDirty = false;
 					if (SaveNameField.IsValid())
 					{
@@ -1369,6 +1635,10 @@ void UPS_Editor_MainWidget_Legacy::PopulateSpawnCatalog()
 	{
 		const FPS_Editor_ResolvedEntry& Entry = Entries[i];
 
+		// Mandatory classes are auto-spawned and singletons — hide them from the catalog so
+		// the user can't add a 2nd instance.
+		if (Entry.bIsMandatory) continue;
+
 		// Category header
 		if (Entry.Category != CurrentCategory)
 		{
@@ -1573,9 +1843,30 @@ void UPS_Editor_MainWidget_Legacy::RefreshPropertiesFromSelection()
 			bPointSelected = (Pawn->ActiveSplinePointIndex >= 0);
 		}
 
+		// SplinePlacement mode is shared with IPS_Editor_ChildMovable — show the right help.
+		bool bChildMovableActive = false;
+		if (APS_Editor_PlayerController* EditorPC2 = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+		{
+			if (AActor* ActiveActor = EditorPC2->GetActivePlacementActor())
+			{
+				bChildMovableActive = ActiveActor->GetClass()->ImplementsInterface(UPS_Editor_ChildMovable::StaticClass());
+			}
+		}
+
 		if (HelpBarText.IsValid())
+		{
+			if (bChildMovableActive)
 			{
 				if (bPointSelected)
+				{
+					HelpBarText->SetText(FText::FromString(TEXT("CHILDREN: Drag gizmo to move | R: rotate | T: translate | Esc/Done: finish")));
+				}
+				else
+				{
+					HelpBarText->SetText(FText::FromString(TEXT("CHILDREN: Click a child to select | Esc/Done: finish")));
+				}
+			}
+			else if (bPointSelected)
 			{
 				HelpBarText->SetText(FText::FromString(TEXT("SPLINE: Drag gizmo to move | Del: delete point | Click line: insert | Click outside: add | Esc/Done: finish")));
 			}
@@ -1587,7 +1878,8 @@ void UPS_Editor_MainWidget_Legacy::RefreshPropertiesFromSelection()
 		}
 		if (SplineEditButton.IsValid()) SplineEditButton->SetVisibility(EVisibility::Collapsed);
 		if (ChildEditButton.IsValid()) ChildEditButton->SetVisibility(EVisibility::Collapsed);
-		if (SplineDeletePointButton.IsValid()) SplineDeletePointButton->SetVisibility(bPointSelected ? EVisibility::Visible : EVisibility::Collapsed);
+		// Delete-point is meaningless for ChildMovable (fixed child set)
+		if (SplineDeletePointButton.IsValid()) SplineDeletePointButton->SetVisibility((bPointSelected && !bChildMovableActive) ? EVisibility::Visible : EVisibility::Collapsed);
 		if (SplineFinishButton.IsValid()) SplineFinishButton->SetVisibility(EVisibility::Visible);
 	}
 	else if (bChildMovableSelected)
@@ -1908,7 +2200,7 @@ void UPS_Editor_MainWidget_Legacy::RebuildDynamicProperties()
 		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: EditableComponent has 0 properties on %s"), *Actor->GetName());
 		return;
 	}
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Building %d dynamic property rows for %s"), EditComp->EditableProperties.Num(), *Actor->GetName());
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Building %d dynamic property rows for %s"), EditComp->EditableProperties.Num(), *Actor->GetName());
 
 	const FSlateFontInfo LabelFont = FCoreStyle::GetDefaultFontStyle("Regular", 9);
 	const FSlateFontInfo ValueFont = FCoreStyle::GetDefaultFontStyle("Regular", 9);
@@ -1936,8 +2228,6 @@ void UPS_Editor_MainWidget_Legacy::RebuildDynamicProperties()
 		Row.DisplayName = EditComp->GetDisplayName(Entry.Path);
 		Row.Key = Entry.Path.ToString();
 
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Resolving [%s] comp='%s' prop='%s'"), *Row.Key, *Row.ComponentName, *Row.PropertyName);
-
 		UObject* Target = FindPropertyTarget(Actor, Row.ComponentName);
 		if (!Target)
 		{
@@ -1958,8 +2248,6 @@ void UPS_Editor_MainWidget_Legacy::RebuildDynamicProperties()
 			UE_LOG(LogTemp, Warning, TEXT("PS_Editor: Property '%s' not found on %s (%s)"), *Row.PropertyName, *Target->GetName(), *Target->GetClass()->GetName());
 			continue;
 		}
-		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Resolved OK → %s on %s"), *Row.CachedProperty->GetName(), *Target->GetClass()->GetName());
-
 		const int32 RowIndex = DynamicPropertyRows.Num();
 
 		// Label
@@ -2206,7 +2494,7 @@ void UPS_Editor_MainWidget_Legacy::RebuildDynamicProperties()
 		DynamicPropertyRows.Add(Row);
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Built %d dynamic property row(s)"), DynamicPropertyRows.Num());
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Built %d dynamic property row(s)"), DynamicPropertyRows.Num());
 }
 
 void UPS_Editor_MainWidget_Legacy::RefreshDynamicPropertyValues()
@@ -2539,7 +2827,7 @@ void UPS_Editor_MainWidget_Legacy::ApplyPropertyFromUI(int32 RowIndex)
 		if (UFunction* RepFunc = Target->FindFunction(Row.CachedProperty->RepNotifyFunc))
 		{
 			Target->ProcessEvent(RepFunc, nullptr);
-			UE_LOG(LogTemp, Log, TEXT("PS_Editor: Called %s on %s"), *Row.CachedProperty->RepNotifyFunc.ToString(), *Target->GetName());
+			UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Called %s on %s"), *Row.CachedProperty->RepNotifyFunc.ToString(), *Target->GetName());
 		}
 	}
 
@@ -2566,7 +2854,7 @@ void UPS_Editor_MainWidget_Legacy::ApplyPropertyFromUI(int32 RowIndex)
 		}
 	}
 
-	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Property %s changed: %s → %s"), *Row.Key, *OldValue, *NewValue);
+	UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Property %s changed: %s → %s"), *Row.Key, *OldValue, *NewValue);
 
 	// Always notify property changed
 	const bool bImplementsInterface = Actor->GetClass()->ImplementsInterface(UPS_Editor_EditableInterface::StaticClass());
@@ -2846,6 +3134,99 @@ void UPS_Editor_MainWidget_Legacy::CancelBaseLevelPopup()
 	PendingBaseLevelSelection.Empty();
 }
 
+void UPS_Editor_MainWidget_Legacy::OpenSettingsPopup()
+{
+	if (SettingsPopup.IsValid())
+	{
+		// Refresh enum-driven options each time the popup opens — covers the case where the
+		// MasterCatalogAsset (or its ScenarioTypeEnum) wasn't set at widget Construct time.
+		RefreshScenarioTypeOptions();
+		SettingsPopup->SetVisibility(EVisibility::Visible);
+	}
+}
+
+void UPS_Editor_MainWidget_Legacy::RefreshScenarioTypeOptions()
+{
+	ScenarioTypeOptions.Empty();
+	if (APS_Editor_PlayerController* PC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+	{
+		if (PC->MasterCatalogAsset && PC->MasterCatalogAsset->ScenarioTypeEnum)
+		{
+			UEnum* E = PC->MasterCatalogAsset->ScenarioTypeEnum;
+			const int32 Count = FMath::Max(0, E->NumEnums() - 1);
+			for (int32 i = 0; i < Count; ++i)
+			{
+				ScenarioTypeOptions.Add(MakeShared<FString>(E->GetDisplayNameTextByIndex(i).ToString()));
+			}
+		}
+	}
+	if (ScenarioTypeCombo.IsValid())
+	{
+		ScenarioTypeCombo->RefreshOptions();
+	}
+}
+
+FString UPS_Editor_MainWidget_Legacy::GetCurrentScenarioTypeDisplayName() const
+{
+	if (UPS_Editor_SpawnManager* SM = SpawnManager.Get())
+	{
+		if (APS_Editor_PlayerController* PC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+		{
+			if (PC->MasterCatalogAsset && PC->MasterCatalogAsset->ScenarioTypeEnum)
+			{
+				UEnum* E = PC->MasterCatalogAsset->ScenarioTypeEnum;
+				const int32 Count = FMath::Max(0, E->NumEnums() - 1);
+				if (SM->ScenarioType < Count)
+				{
+					return E->GetDisplayNameTextByIndex(SM->ScenarioType).ToString();
+				}
+			}
+		}
+	}
+	return FString();
+}
+
+void UPS_Editor_MainWidget_Legacy::CloseSettingsPopup()
+{
+	if (SettingsPopup.IsValid())
+	{
+		SettingsPopup->SetVisibility(EVisibility::Collapsed);
+	}
+}
+
+void UPS_Editor_MainWidget_Legacy::OnUseDynamicNavigationToggled(ECheckBoxState State)
+{
+	UPS_Editor_SpawnManager* SM = SpawnManager.Get();
+	if (!SM) return;
+
+	const bool bEnabled = (State == ECheckBoxState::Checked);
+	SM->bUseDynamicNavigation = bEnabled;
+	bSceneDirty = true; // user changed a per-scenario setting
+
+	// Apply live to the level's RecastNavMesh actors.
+	PS_Editor_NavUtils::SetDynamicNavigationEnabled(GetWorld(), bEnabled);
+}
+
+void UPS_Editor_MainWidget_Legacy::OnShowNavMeshToggled(ECheckBoxState State)
+{
+	UPS_Editor_SpawnManager* SM = SpawnManager.Get();
+	if (!SM) return;
+
+	const bool bVisible = (State == ECheckBoxState::Checked);
+	SM->bShowNavMesh = bVisible;
+
+	PS_Editor_NavUtils::SetNavMeshVisible(GetWorld(), bVisible);
+}
+
+void UPS_Editor_MainWidget_Legacy::ToggleShowNavMesh()
+{
+	UPS_Editor_SpawnManager* SM = SpawnManager.Get();
+	if (!SM) return;
+
+	SM->bShowNavMesh = !SM->bShowNavMesh;
+	PS_Editor_NavUtils::SetNavMeshVisible(GetWorld(), SM->bShowNavMesh);
+}
+
 void UPS_Editor_MainWidget_Legacy::OnCloseClicked()
 {
 	if (CloseConfirmOverlay.IsValid())
@@ -3472,7 +3853,7 @@ void UPS_Editor_MainWidget_Legacy::RebuildTimelineTracksList()
 						// previously-selected actor (e.g. a spline still in overlay-visible state)
 						// is properly released and its handles/highlight go away.
 						AActor* TrackActor = TS2->FindActorById(Tr.ActorId);
-						UE_LOG(LogTemp, Log, TEXT("PS_Editor: Key click — track=%d key=%d ActorId=%s resolved=%s"),
+						UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Key click — track=%d key=%d ActorId=%s resolved=%s"),
 							CapturedTrack, CapturedKey, *Tr.ActorId.ToString(), TrackActor ? *TrackActor->GetName() : TEXT("null"));
 						if (TrackActor)
 						{

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/Widgets/PS_Editor_MainWidget_Legacy.h

@@ -80,6 +80,11 @@ private:
 	TSharedPtr<STextBlock> SnapText;
 	TSharedPtr<SEditableTextBox> SnapSizeField;
 
+	// Floor-cut UI (editor-only horizontal plane that hides primitives above AnchorZ+H)
+	TSharedPtr<STextBlock> FloorCutToggleText;
+	TSharedPtr<class SSlider> FloorCutSlider;
+	TSharedPtr<STextBlock> FloorCutValueText;
+
 	// Spawn catalog
 	TSharedPtr<SVerticalBox> SpawnListContainer;
 
@@ -107,6 +112,21 @@ private:
 	void ConfirmBaseLevelSelection();
 	void CancelBaseLevelPopup();
 
+	// Global Settings popup (per-scenario nav option + session-only navmesh visu + scenario type).
+	TSharedPtr<SWidget> SettingsPopup;
+	void OpenSettingsPopup();
+	void CloseSettingsPopup();
+	void OnUseDynamicNavigationToggled(ECheckBoxState State);
+	void OnShowNavMeshToggled(ECheckBoxState State);
+	/** Toggle the navmesh visualization (P key handler). */
+	void ToggleShowNavMesh();
+
+	// Scenario type dropdown — populated from MasterCatalog::ScenarioTypeEnum, hidden when null.
+	TArray<TSharedPtr<FString>> ScenarioTypeOptions;
+	TSharedPtr<SComboBox<TSharedPtr<FString>>> ScenarioTypeCombo;
+	void RefreshScenarioTypeOptions();
+	FString GetCurrentScenarioTypeDisplayName() const;
+
 	// Transform fields
 	TSharedPtr<SEditableTextBox> LocX, LocY, LocZ;
 	TSharedPtr<SEditableTextBox> RotX, RotY, RotZ;

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/Widgets/PS_Editor_MainWidget_UMG.cpp

@@ -4,7 +4,9 @@
 #include "PS_Editor_SpawnManager.h"
 #include "PS_Editor_SceneSerializer.h"
 #include "PS_Editor_PlayerController.h"
+#include "PS_Editor_FloorCutManager.h"
 #include "GameFramework/PlayerController.h"
+#include "Engine/World.h"
 
 void UPS_Editor_MainWidget_UMG::SetSelectionManager(UPS_Editor_SelectionManager* InSelectionManager)
 {
@@ -130,7 +132,7 @@ bool UPS_Editor_MainWidget_UMG::LoadScenario(const FString& Name)
 	}
 	if (!SM) SM = SpawnManager.Get();
 	if (!Ser || !SM || Name.IsEmpty()) return false;
-	Ser->LoadScene(Name, SM);
+	Ser->LoadScenario(Name, SM);
 	OnSceneDirty.Broadcast();
 	return true;
 }
@@ -161,6 +163,54 @@ void UPS_Editor_MainWidget_UMG::ClearSelection()
 	}
 }
 
+// -------------------- Floor cut --------------------
+
+void UPS_Editor_MainWidget_UMG::SetFloorCutEnabled(bool bEnabled)
+{
+	if (UWorld* W = GetWorld())
+	{
+		if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+		{
+			FC->SetEnabled(bEnabled);
+		}
+	}
+}
+
+void UPS_Editor_MainWidget_UMG::SetFloorCutHeightCm(float HeightCm)
+{
+	if (UWorld* W = GetWorld())
+	{
+		if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+		{
+			FC->SetHeightAboveAnchor(HeightCm);
+		}
+	}
+}
+
+bool UPS_Editor_MainWidget_UMG::IsFloorCutEnabled() const
+{
+	if (UWorld* W = GetWorld())
+	{
+		if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+		{
+			return FC->IsEnabled();
+		}
+	}
+	return false;
+}
+
+float UPS_Editor_MainWidget_UMG::GetFloorCutHeightCm() const
+{
+	if (UWorld* W = GetWorld())
+	{
+		if (UPS_Editor_FloorCutManager* FC = W->GetSubsystem<UPS_Editor_FloorCutManager>())
+		{
+			return FC->GetHeightAboveAnchor();
+		}
+	}
+	return 200.f;
+}
+
 // -------------------- Getters --------------------
 
 EPS_Editor_TransformMode UPS_Editor_MainWidget_UMG::GetCurrentTransformMode() const

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/Widgets/PS_Editor_MainWidget_UMG.h

@@ -70,6 +70,22 @@ public:
 	UFUNCTION(BlueprintCallable, Category = "PS Editor|Selection")
 	void ClearSelection();
 
+	// ---- Floor cut (editor-only horizontal plane that hides upper floors) ----
+
+	/** Enable/disable the floor cut. Slider value drives the cut height in cm above the
+	 *  MandatoryAnchor. */
+	UFUNCTION(BlueprintCallable, Category = "PS Editor|FloorCut")
+	void SetFloorCutEnabled(bool bEnabled);
+
+	UFUNCTION(BlueprintCallable, Category = "PS Editor|FloorCut")
+	void SetFloorCutHeightCm(float HeightCm);
+
+	UFUNCTION(BlueprintPure, Category = "PS Editor|FloorCut")
+	bool IsFloorCutEnabled() const;
+
+	UFUNCTION(BlueprintPure, Category = "PS Editor|FloorCut")
+	float GetFloorCutHeightCm() const;
+
 	// ==================== BP-PURE GETTERS ====================
 	UFUNCTION(BlueprintPure, Category = "PS Editor|Tools")
 	EPS_Editor_TransformMode GetCurrentTransformMode() const;

Unreal/Plugins/PS_Editor/Source/PS_EditorTools/PS_Editor_BlueprintFromMesh.cpp

@@ -185,6 +185,19 @@ void FPS_Editor_BlueprintFromMesh::CreateBlueprintForAsset(UObject* MeshAsset)
 	USCS_Node* EditableNode = SCS->CreateNode(UPS_Editor_EditableComponent::StaticClass(), FName("PS_Editor_Editable"));
 	SCS->AddNode(EditableNode);
 
+	// Enable replication on the generated BP — without it the actor is server-local only and
+	// clients never see it spawn. SetReplicates() is the public path (the bReplicates field
+	// itself is protected). SetReplicateMovement is paired so any server-side transform change
+	// (timeline keyframe, scripted move) propagates to clients.
+	if (UClass* GeneratedClass = Blueprint->GeneratedClass)
+	{
+		if (AActor* CDO = Cast<AActor>(GeneratedClass->GetDefaultObject()))
+		{
+			CDO->SetReplicates(true);
+			CDO->SetReplicateMovement(true);
+		}
+	}
+
 	// Compile and save
 	FBlueprintEditorUtils::MarkBlueprintAsStructurallyModified(Blueprint);
 	FKismetEditorUtilities::CompileBlueprint(Blueprint);