Unreal Engine Issues
Unreal Engine Issues
Indirect lighting samples incorrect if duplicated levels placed in same persistent level
UE - Graphics Features - Aug 29, 2017Indirect lighting samples were not made correctly when building lighting with umap duplicated via the content browser and registering both source and destination as sublevels in one map. ...
Arrays of user-defined structs are not initialized properly in a nativized Blueprint class.
UE - Gameplay - Blueprint - Feb 28, 2018New elements are not being initialized properly when setting up the default value for arrays of user-defined structures in nativized Blueprint C++ constructor code. ...
[CrashReport] UE4Editor_MovieScene!FMovieSceneEvaluationTrack::EvaluateStatic() [moviesceneevaluationtrack.cpp:445]
UE - Anim - Sequencer - Apr 11, 2018No comments from users in crash group 442 void FMovieSceneEvaluationTrack::EvaluateStatic(FMovieSceneSegmentIdentifier SegmentID, const FMovieSceneEvaluationOperand& Operand, FMovieSceneConte ...
Copying a grouped MaterialInstanceParameterDetail property that has spaces on it's name does not enclose it in double quotes, and later pasting won't work as expected
UE - Rendering - Architecture - Materials - Aug 24, 2025Copying a grouped MaterialInstanceParameterDetail property that has spaces on it's name does not enclose it in double quotes, and later pasting won't work as expected. The licensee noticed this in a ...
Mobile Previewer: Safe Zone Invalid Until Window Resize
UE - Platform - Mobile - Jul 12, 2021When the Mobile Previewer loads, the Safe Zone widget is not working properly at startup, and requires a window resize to update to the correct Safe Zone. ...
Crash occur when loading AInstancedPlacementPartitionActor
UE - Editor - May 17, 2022Crashes when loading an actor that inherits from AInstancedPlacementPartitionActor. There is a serialization size mismatch. ...
IOS crash disabling idle timer when closing the app
UE - Platform - Mobile - Apr 29, 2020Licensee report of crash during shutdown due to setting [UIApplication sharedApplication].idleTimerDisabledbeing from the Game thread. Grouped together with others items in [Link Removed] ...
Custom UVs don't store information properly in layered materials.
UE - Rendering - Architecture - Materials - May 9, 2022[Link Removed] I have this set up so that FX artists can stack UV manipulations, so I don't want to just have all the UV manipulation in the layer with the base color, even though that does give me ...
Crash calling user-function in non-editor
Tools - Apr 27, 2020Crash occurs when attempting to call native Pre-Construct in the attached project. ...
Crash caused by a race condition in Nanite::DispatchBasePass()
UE - Rendering - Graphics Features - Nanite - Feb 25, 2026Nanite::BuildShadingCommands() launches two asynchronous tasks: ShadingCommands.SetupTask ShadingCommands.BuildCommandsTask BuildCommandsTask is responsible for modifying ShadingCommands.Commands ...