Unreal Engine Issues
Unreal Engine Issues
SynthComponent does not execute OnStop() after calling Stop()
UE - Audio - Nov 26, 2019SynthComponent does not execute OnStop() after calling Stop(). OnStop() will be called in PumpPendingMessages() via OnGeneratePCMAudio(). But after stopping the AudioComponent, the procedural Sound ...
Crash when plugging Depth Fade to Base Color and using Required Texture Resolution mode
UE - Graphics Features - Dec 1, 2020Crash when plugging Depth Fade to Base Color and using Required Texture Resolution mode Hi, We have a material that uses the Depth Fade node for the Opacity and Base Color. However, the engine cras ...
Materials using Landscape Layer Blend are black
UE - Graphics Tools - Terrain - Landscape - May 4, 2022When applying a Landscape Layer Blend of textures to the Material Base Color, the preview does not update or shows black instead of how the material is supposed to look. When you disconnect the lay ...
Assertion fails when a struct is opened with a BP class reference stored and with that struct as a variable in the BP class that's referenced.
UE - Gameplay - Blueprint - May 10, 2022Assertion fails when a struct is opened with a class reference stored and with the struct as a variable in the class that's referenced. A restart is required in order to see this occur. Repro Rate: ...
"stat llmassets" console command not recognised
UE - CoreTech - Jun 16, 2023I am trying to use "stat llmassets" but it is not recognising the command. I have enabled LLM_ALLOW_ASSETS_TAGS and added -llmtagsets=assets to the commandline along with -llm, is there anything els ...
Niagara preview viewport and timeline are locked to 30fps
UE - Niagara - Aug 10, 2020The Niagara preview viewport seems to be fixed at a 30fps update time, which makes it difficult to fine-tune short lifetime FX. It would be good to either have options for viewport max fps, or for s ...
[AI] UE_MT_SCOPED_READ_ACCESS(NavElementAccessDetector) Fails in editor on fresh sync
UE - AI - Navigation - Jan 27, 2025Licensees have reported failed multi-thread access code for NavElementAccessDetector in complex levels that have not finished compilation of their static meshes. The eventual failed check is inside ...
Wolrd Partition Foliage Builder - Fails to build with multiple external actor folders.
UE - World Creation - Worldbuilding Tools - World Partition - Apr 1, 2025Hello, We are building a world with world partition & a lot of nanite foliage. We want to modify out Foliage Instance grid size via the commandlet. [Link Removed] Even in a new empty level the c ...
IsValidOrFixable can be false even when IsValid is true in RawMesh.cpp
UE - Graphics Features - Mar 14, 2016In RawMesh.cpp, there are two functions called IsValid and IsValidOrFixable. A user has reported that there may be an issue here where IsValid can be true while IsValidOrFixable is false. From look ...
[CrashReport] UE4Editor_SlateCore!IsResourceObjectValid() [drawelements.cpp:23]
Tools - Aug 2, 2018No user comments in crash group 18 FSlateShaderResourceManager* FSlateDataPayload::ResourceManager; 19 20 static bool IsResourceObjectValid(UObject*& InObject) 21 ...