Added: Initial world generation tool

Source/SaltyEditor/Authoring/LandscapeAuthoringLibrary.cpp

@@ -7,6 +7,7 @@
 #include "LandscapeSubsystem.h"
 #include "Engine/World.h"
 #include "Materials/MaterialInterface.h"
+#include "RenderingThread.h"
 
 ALandscape* ULandscapeAuthoringLibrary::CreateLandscapeFromHeightmap(UWorld* World, const FString& HeightmapFile,
 	const TArray<FLandscapeAuthoringWeightmap>& Weightmaps, UMaterialInterface* Material,
@@ -130,6 +131,21 @@ ALandscape* ULandscapeAuthoringLibrary::CreateLandscapeFromHeightmap(UWorld* Wor
 		}
 	}
 
+	// Edit layers are always on, and the render heightmaps and weightmaps are produced from the imported layer
+	// data by the edit-layer merge, which normally runs on the editor tick. A commandlet never ticks, so without
+	// this the saved level has the imported collision heights but flat, empty render textures, and the landscape
+	// is invisible from below. The editor's own import does the same full update before saving.
+	Landscape->ForceLayersFullUpdate();
+	for (int32 Attempt = 0; Attempt < 500 && !Landscape->IsUpToDate(); ++Attempt)
+	{
+		Landscape->TickLayers(1.0f / 30.0f);
+		FlushRenderingCommands();
+	}
+	if (!Landscape->IsUpToDate())
+	{
+		UE_LOG(LogSaltyEditor, Warning, TEXT("CreateLandscapeFromHeightmap: the edit-layer update did not finish; render heightmaps may be stale"));
+	}
+
 	UE_LOG(LogSaltyEditor, Log, TEXT("CreateLandscapeFromHeightmap: %ux%u vertices, %dx%d components of %d quads, scale (%g, %g, %g), %d paint layers"),
 		RequiredResolution.Width, RequiredResolution.Height, ComponentCount.X, ComponentCount.Y, QuadsPerComponent, Scale.X, Scale.Y, Scale.Z, LayerInfos.Num());
 	return Landscape;

Source/SaltyEditor/SaltyEditor.Build.cs

@@ -17,7 +17,8 @@ public class SaltyEditor : ModuleRules
 		PrivateDependencyModuleNames.AddRange(new string[] {
 			"UnrealEd",
 			"Landscape",
-			"LandscapeEditor"   // FLandscapeImportHelper reads the heightmap and weightmap files
+			"LandscapeEditor",  // FLandscapeImportHelper reads the heightmap and weightmap files
+			"RenderCore"        // FlushRenderingCommands while the edit-layer merge is driven by hand
 		});
 
 		PublicIncludePaths.Add(ModuleDirectory);