Unreal Engine Issues
Unreal Engine Issues
Bug - Animations and Keep State Fail when scrubbing backward.
UE - Anim - Sequencer - Jan 30, 2020If you scrub past an animation with keep state, and scrub into an animation with defaults everything is fine. When you scrub back to the animation with keep state, the animation breaks, until there ...
Color space transform in the UI composition is incorrect on DX12 HDR (r.HDR.UI.CompositeMode=1)
UE - Graphics Features - Jun 11, 2021Color space conversion in the UI composition is incorrect on DX12 HDR. In the main() function In CompositeUIPixelShader.usf, you can see the following color space transform.// sRGB -> RRT -> ODT ...
Material slot assignment incorrect after mesh reduction completely removes all triangles from a section
UE - Editor - Content Pipeline - Asset Build - Apr 28, 2022When mesh reduction results in a section becoming empty, the material slots are incorrectly assigned. e.g. if section 0 gets removed due to it having no triangles after reduction, then its material ...
Deferring Blueprint CDO construction at load time is leading to some data loss.
UE - Gameplay - Blueprint - Jan 27, 2023Various licensees are reporting data loss on load due to the change that was made for [Link Removed] in which we now defer Blueprint CDO construction on load until the finalization phase. This issu ...
UKismetArrayLibrary::GenericArray_Shuffle is weighted to return some results more than others
UE - Gameplay - Aug 15, 2017The implementation of UKismetArrayLibrary::GenericArray_Shuffle() will generate certain array shuffle results more often (up to three times as much) than others, rather than having a roughly equal c ...
[CrashReport] UE4Editor_Landscape!ULandscapeInfo::RegisterActor() [landscape.cpp:1882]
UE - LD & Modeling - Terrain - Landscape - Aug 28, 2017This is a common crash coming out of the 4.17 release. User Descriptionstrying to delete landscape related stuff A similar callstack was seen in an older issue, [Link Removed]. Source Context ...
Skeletal Meshes have physics collisions lag
UE - Simulation - Physics - Oct 2, 2019Skeletal mesh's physics collision lag behind the actual mesh. It didn't matter if there was just a root bone or multiple bones/constraints. This doesn't happen when using static meshes. The effect ...
Changing the name of a native component results in a blank details panel
UE - Gameplay - Components - May 7, 2021Much like [Link Removed] (which I'm backing down on my by design claim), there is an issue where if you previously referenced a component that no longer exists, the correct instanced subobject is lo ...
Subsurface Scattering Checkerboard with SceneColourFormat 3 (High Scalability) leads to a visual artefact when temporal upscaling is in use
UE - Graphics Features - Sep 30, 2024Primarily visible at very low internal resolutions (25-33%), the SSS checkerboard with an RGB scene colour format (r.SceneColorFormat 3) causes a double-image artefact both internally and on the sil ...
Descriptions for vis log shapes in the Rewind Debugger are misaligned
UE - AI - Debugging - Mar 25, 2025When recording shape information, descriptions are offset from the shape. Licensee Message - I noticed that the capsule vis log description labels were not lining up after replaying the recording ...