Unreal Engine Issues

UnLit materials are not masked out on mobile deferred lighting pass with depth prepass enabled

Creating a Packed Level Instance from an asset with a negative Scale Transform inverts normals

Creating a Packed Level Instance from an asset with a negative Scale Transform inverts normals. Using Create Level Instance will not cause this to occur. ...

SetAllBodiesBelowPhysicsDisabled functionality appears to leave bodies behind that raycasts can still interact with.

From UDN We use SetAllBodiesBelowPhysicsDisabled() to disable some bodies of our Vehicle. However by drawing the disabled bodies' particles position, we found those particles stay where they disab ...

GeometryCollection clustered by ClusteredGroupIndex does not respect child's gravity setup

Following code works as a workaround void FClusterUnionManager::HandleAddOperation(FClusterUnionIndex ClusterIndex, const TArray<FPBDRigidParticleHandle*>& Particles, bool bReleaseClustersFirst) ...

Blueprint Add Custom Event unable to resolve delegate signature inside a split struct

This issue occurs when a static function is created and has a struct parameter that has a delegate exposed to blueprint. When using the helper function in blueprint after having used "Split Struct ...

Pressing the "Show Inactive" button in the material instance editor did not display groups that did not contain the active parameter

When pressing the "Show Inactive" button in the material instance editor, all material parameters are supposed to be displayed in the EditorUI. This is not the case, only some of the parameters are ...

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 ...