Unreal Engine Issues
Unreal Engine Issues
Additives using Frame From This Animation as the Base Pose Type fail to retarget correctly
UE - Anim - Rigging - Retargeting - Feb 13, 2025Additive animations that use a frame from their own sequence as a base pose are initially broken when retargeted. Users have to refresh the properties that select the base pose in order to fix the ...
Actors transforms broken in cooked builds when their parent is an IsEditorOnlyActor
UE - Framework - Oct 7, 2025When creating a hierarchy of Actors in the Outliner, the transform of the "child" actors will be reset if their Parent's IsEditorOnlyActor property is true. The project in the EPS case is using ...
Changing Texture compression settings breaks Materials with mismatch on Texture Sample Sampler Type
UE - Rendering - Architecture - Materials - Aug 5, 2015If you change a texture's compression settings, materials will show errors because of a mismatch in the Sampler Type of Texture Samples. This can be fixed by adjusting the Sampler Type and re-savin ...
Switching to different modes in the Modes panel causes PIE to take input from a connected VR headset for the Y axis camera movement
UE - Platform - XR - Dec 9, 2016If a VR headset is connected, it will be used for Y axis camera input in PIE if you have switched to and from the Landscape tab in the Modes panel. You can fix this temporarily by reopening the edit ...
[CrashReport] Mac crash in UE4Editor-Engine.dylib!LoadPhysXModules()::$_0::operator()()
UE - Platform - Apple - Jun 8, 2017This is a common Mac crash that has been occurring since 4.15. It shares the same callstack with [Link Removed], but that was verified fixed for 4.16.0, while this crash still continues into 4.16. ...
Material Ambient Occlusion Does Not Work With Skylight Set to Movable
UE - Graphics Features - Jul 27, 2018Material ambient occlusion does not work with the skylight set to movable. Setting the material to allow static lighting will fix the issue until the level is reloaded. Found in 4.19 CL# 4033788, 4 ...
The Brush Clip doesn't slice in othrographic view
UE - LD & Modeling - Modeling Tools - BSP - Jun 20, 2019Brush clip slicing doesn't work whenever slicing in Left sided Othrographic view mode. Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 6837701), 4.24 (CL - 7095658) ...
Indirect lighting not working for meshes
UE - Graphics Features - Jul 2, 2019Materials using the WorldAlignedTextures_Complex node causes the static meshes they are applied to to not receive indirect lighting. Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053642), 4.23 (CL ...
Spatialized audio does not work in ActorSequence components or play in Sequencer Editor
UE - Anim - Sequencer - Aug 8, 2019A sequence made from a sequence actor component doesn't play audio in editor or in PIE when the child of another actor or track. This was reported and tested in 4.22.3 (CL-7053642). This was reprod ...
Crash after clicking the Build button on Linux
UE - Platform - Linux - Sep 17, 2019This crash is a regression from 4.22.3 (CL-7053642). If lighting is built by selecting "Build Lighting Only" the Editor will not crash. This does not reproduce on Windows with -vulkan. This was rep ...