Unreal Engine Issues

Specular lighting occurs that ignores occlusion when lighting a Subsurface material from behind

Incremental GC vs Loading Screens deadlock

A licensee is reporting that using a loading screen with the incremental garbage collector can result in a dead lock when a loading screen is displayed. The licensee found out that:  -------------- ...

Level viewport toolbar buttons on the right side are collapsed even if the viewport has enough width

The following worka round works :float SLevelViewportToolBar::GetTransformToolbarWidth() const { ... #if 0 // float ViewportToolBarWidth = static_cast<float>(GetCachedGeometry().GetLocalSize(). ...

Virtual Bone caused nanite skinned mesh crash

When a Nanite skeletal mesh has a virtual bone the engine can crash when changing LODs ...

Performance hitch from RemoveGeometryCache flushing the render thread

FGeometryCacheStreamingManager::RemoveGeometryCache calls FlushRenderingCommands which shows up as a hitch when profiling. [Link Removed] Ideally the flush added in CL#23782411 to fix a rare deadl ...

Significant hitch occurs when invoking ApplySettings on a UGameUserSettings object

Calling the ApplySettings method on a UGameUserSettings object results in a noticeable hitch, with severity proportional to the number of primitive components present in the scene. This hitch stems ...

If 'Enable Physics Interaction' is disabled, the player can still interact with physics objects

If 'Enable Physics Interaction' is disabled, the player can still interact with physics objects User Description: I have a Bus Vehicle with custom physics (skeletal mesh). So I can walk through th ...

Engine Hangs or Fails to Load upon Restart after Enabling New Planar Reflections in Rendering Settings

After enabling the new 'Support Global Clip Plane for Planar Reflections' option in 4.12, the project hangs at 45% after restarting. As a note, I had another teammate attempt to enable this option ...

Tile Grid persistently visible with Tile Map when viewed through Orthographic Camera

The Tile Map grid is consistently visible when playing and viewed through Orthographic camera. The user reporting the issue noted some observations which I can also confirm are occurring in both en ...

Scene Capture 2D not updating capture size when played in fullscreen mode

The Displayed Render Target Textures are not accurately resizing when the Game is played in Fullscreen mode. [Link Removed] Also tested in Promotable-CL-2455917 ...