Remove mock GameObject/Prefab code from managed MapEntity Add CMapGameObject map node with managed counter part that wraps a GameObject Hammer world's Scene uses HammerSceneEditorSession Add HammerManagedInspector that can take over if it likes the MapNode. We only like MapGameObject for now Run Scene.EditorDraw() on MapView for gizmos, remove old Entity.DrawGizmos Hammer: Create GameObject Test option More explicit HammerEvents Managed map node callback interface, a little convoluted because of mapdoclib <-> hammer <-> managed. But this is easier to do callbacks and can return values And the managed side Serialize/deserialize CMapGameObject CMapGameObject::GeneratesEntityModelGeometry() Expose CMapGameObject JSON to MapBuilder via IHammerMapLoader Collect CMapGameObjects, compile them into scene.json inside the vpk and let MapInstance load them (Very hacky code needs cleaning up) MapWorld.Scene sets a Scene.Source in an attempt to make AG happy Tie Meshes to GameObject button