Unreal Engine Issues
Unreal Engine Issues
wire import crash on file generated by alias 2021.3
UE - Editor - Content Pipeline - Import and Export - Jul 20, 2021Our company has updated Alias to 2021.3.1 and now Datasmith crashed when importing .wire files. Previously we had Alias 2019 and Alias 2021.1 installed. Now just Alias 2021.3.1 and then the issue be ...
Ragdoll Physics Assets Move Sporadically After Ragdoll Physics Event Invoked
UE - Simulation - Physics - Character - May 3, 2022Occurs 3/3 times. Skeletal mesh with ragdoll physics applied exhibits sporadic motion after ragdoll physics is initiated. Regression does occur: When tested in //UE4/Release-4.27.2 @ CL18319896 n ...
Soft angular constraints solve velocity like hard constraints
UE - Simulation - Core - Jul 17, 2025Soft angular constraints are solving velocity like hard constraints. Instead of swinging back and forth, the affected body just snaps to 45 degrees. Check the steps to reproduce for more details. Th ...
Indirect Lighting Cache causes Flickering on Skeletal Meshes
UE - Graphics Features - Apr 30, 2017Indirect Lighting Cache is causing the Indirect Lighting for Skeletal Meshes to flicker. I have attempted both ILCQ Volume and Point cache qualities, and it seems Point produces the most exaggerate ...
[CrashReport] UObjectBaseUtility::GetOutermost | FArchiveInvalidateTransientRefs::operator<<
UE - Gameplay - Blueprint - Sep 7, 2017This is a somewhat common crash affecting users in 4.17. They have not provided any descriptions of their actions when the crash occurred. Source Context 110 /** 111 * Walks up ...
Static mesh's material slot's cast shadow does not require a build of StaticLight
UE - Graphics Features - Dec 7, 2017If static mesh's material slot's cast shadow is changed, UE4 does not show "LIGHTING NEEDS TO BE REBUILT". I solved it with the following fixes. StaticMeshEditorTools.cpp void FMeshSectionSettin ...
Cannot run any packaged project if "Force all skinned meshes to recompute tangents" has been enabled in an unrelated project
UE - Foundation - Core - Apr 20, 2018Enabling the "Force all skinned meshes to recompute tangents" sets the value at a Windows user level so that it affects all UE4 projects opened by that user, including unrelated packaged projects. T ...
Undo then Redo Creating a Spawnable in Sequencer Creates Extra Actor in Level
UE - Anim - Sequencer - May 3, 2023There is a bug when performing an undo/redo on pasted or spawned actors in Sequencer. It appears that the transaction system is re-creating an actor on redo, but Sequencer doesn't see that, so it ...
Unnecessary files in Perforce Depot
Several unnecessary files seem to have found their way into the Perforce depot and need to be cleaned up. Affected files:Engine/Documentation/Source/Engine/Matinee/HowTo/MHT_3/Images/MHT#_Drag_In_C ...
Foliage experiences odd culling when world origin is changed
UE - Graphics Features - Sep 13, 2017There is an odd issue occurring when the world origin is changed, changing the world origin causes the foliage to cull in unexpectred ways. The issue can be solved by using the console command "r.Al ...