Unreal Engine Issues
Unreal Engine Issues
Crash on loading pre-4.20 cloth data when compute skin cache is enabled in 4.21
UE - Graphics Features - Mar 19, 2019According to information from the licensee, the else clause was added to "FSkeletalMeshLODModel::(GetClothMappingData()" at CL 4437969 , but if it is the cloth data existing from 4.20 or earlier, it ...
Compile on load crashes for classes within an abstract class
UE - Gameplay - Blueprint Compiler - Feb 20, 2021When compiling on load in -game, a blueprint class that inherits from a native class that is marked within and the class that it is within is abstract, a crash will occur when FBlueprintCompilationM ...
Incorrect volume bounds check in FTranslucentLightInjectionCollector::AddLightForInjection
UE - Graphics Features - Apr 8, 2025The 'VolumeBounds' array in FTranslucentLightInjectionCollector::AddLightForInjection is accessed as a pointer instead of with 'VolumeCascadeIndex' and thus fails bounds checks for the outer volume. ...
Setting Slate.ShowBatching to 1 makes the entire screen green unexpectedly
UE - Editor - UI Systems - Slate - Jun 19, 2025This issue may have occurred due to a refactoring of the related functionality during the engine update from version 5.4 to 5.5. The main reason is that the randomization of BatchColor doesn't work ...
Lighting Scenarios Map Check warning about multiple skylights not supported
UE - Graphics Features - Dec 5, 2016When using Lighting Scenarios and placing a skylight in the lighting scenario levels when you build lighting there will be a map check warning that "Multiple sky lights are active, only one can be e ...
Crash when setting Texture Target for Render Target 2D created at Runtime
UE - Graphics Features - Feb 2, 2017A crash occurs when creating a Render Target 2d and setting the texture target at runtime. After running some more tests, the crash seems to occur when setting the texture target, as the creation o ...
[CrashReport] UE4Editor_Core!FGenericPlatformMemory::OnOutOfMemory() [genericplatformmemory.cpp:161]
UE - Graphics Features - Apr 20, 2017Based on CrashVisualizer data, crashes of this nature are the 4th most common in the 4.15.1 release. This crash may be expected due to the clear messaging that the system is out-of-memory, but this ...
Specular Highlight Much Stonger/Larger In Forward Shading
UE - Graphics Features - May 15, 2017In forward shading specular highlights appear to be much larger for very smooth materials in contrast to the deferred shader. In 4.14.3 the specular highlights were displaying correctly in forward s ...
Certain combined Linear/Angular movements cause Client to freeze for several seconds
UE - Simulation - Physics - May 24, 2019When using Replicated Movement, certain combined linear/angular movements cause the client to freeze for several seconds and then catch up to the server. This is a regression from 4.21.2 (CL-4753647 ...
RemoveAxisMapping() removes axis mappings of the same key regardless of Scale value
UE - Gameplay - Jun 26, 2019When you remove an axis mapping using a specific key it will remove all mappings even if they have separate scales. The user found a fix that I verified that worked. In "InputSettings.cpp", which i ...