Unreal Engine Issues
Unreal Engine Issues
USD Stage - Import loses UV on a skeletalmesh with animation
UE - Editor - Content Pipeline - USD - Apr 28, 2026https://forums.unrealengine.com/t/usd-import-issue-when-trying-to-import-skeleton-with-animation/2718449 I put another png has the user forgot to add theirs. ...
GetStaticComponentMaskParameterValue returns the value for Static Switch Parameter
UE - Rendering - Architecture - Materials - Apr 24, 2026UMaterialInterface::GetStaticComponentMaskParameterValue gets the parameter value from the static switch list instead of from the StaticComponentMask list GitHub branch 5.8 still looks to have this ...
New European Tree Pack assets exhibit severe pop-in exported videos.
TM - Content - Apr 24, 2026Reported in SF [Link Removed] The new trees from the European Trees Pack display heavy pop=in in exported videos when the scene contains dense vegetation. Other older tree assets don’t display thi ...
Landscape displaces after converting file to Twinmotion 2026.1
TM - Core - Apr 23, 2026Reported in SF [Link Removed] The client has a file from Twinmotion 2025.2 that contains a sculpted landscape. When converting the file to Twinmotion 2026.1, the landscape becomes displaced from it ...
Collision Animators set to Once Loop mode will not play in Cloud Presentations
TM - Tools - Apr 21, 2026Reported in SF [Link Removed] Animators will not trigger in Cloud Presentation when in Collision mode and the Loop mode is set to Once. The animation playback will occur properly in the editor vie ...
"Move Selection to Current Level" can duplicate actors when cancelling
UE - Editor - Workflow Systems - Apr 17, 2026When moving an Actor that is referenced in the source level, UEditorEngine::CopySelectedActorsToClipboard will try to select the Actor for delete which will pull the \"Delete Referenced Actor\" dial ...
ServerUpdateLevelVisibility called multiple times from UWorld::AddToWorld/RemoveFromWorld due to child connections
UE - World Creation - Worldbuilding Tools - World Partition - Apr 16, 2026A recent change to ULevelStreaming::ServerUpdateLevelVisibility ensures that this only calls APlayerController::ServerUpdateLevelVisibility once for any non-child connections ( ...
Deadlock during cooking or editor in URigHierarchyController::AddElement on task thread while GarbageCollection occurs on gamethread.
UE - Anim - Runtime - Apr 15, 2026In URigHiearchyController::AddElement (and other functions), arbitrary delegate code is called while holding Hierarchy->ElementsLock, through the Notify function. URigHierarchy::AddReferencedObject ...
Megalights support for anisotropic materials
UE - Rendering - Graphics Features - Lumen - Apr 14, 2026A licensee noticed that SUPPORTS_ANISOTROPIC_MATERIALS is not passed to FShadeLightSamplesCS::ModifyCompilationEnvironment for MegaLights ShadeLightSampleCS. Adding it fixes the issue. ...
CharacterMovementComponent boosted upward when falling into acute-angle sloped corner
UE - Gameplay - Player Movement - Apr 14, 2026In UCharacterMovementComponent::TwoWallAdjust, characters can gain unintended upward velocity (slope boosting) when hitting corners with an acute angle (<=90 degrees) while in the Falling movement m ...