Init repo

Source/UShaderLabEditor/Private/ShaderLabEditorModule.cpp

@@ -4,6 +4,7 @@
 #include "Engine/Engine.h"
 #include "IDirectoryWatcher.h"
 #include "Interfaces/IPluginManager.h"
+#include "MaterialShared.h"
 #include "Materials/Material.h"
 #include "Misc/Paths.h"
 #include "Modules/ModuleManager.h"
@@ -31,7 +32,15 @@ namespace
 			}
 			return;
 		}
-		// Recompile for rendering / editor preview (async).
+
+		// Recompile the base AND propagate to everything that depends on it. A bare PostEditChange
+		// recompiles only the base shell; the instances carry their own static-permutation shader maps
+		// (and the level components render those), so on a hot-reload they must be recompiled and
+		// re-pushed too. FMaterialUpdateContext does exactly that on scope exit: recompile the listed
+		// material, then recache every dependent instance and refresh the components/viewports using it.
+		FMaterialUpdateContext UpdateContext;
+		UpdateContext.AddMaterial(&Material);
+		Material.PreEditChange(nullptr);
 		Material.PostEditChange();
 	}
 }