Unreal Engine Issues
Unreal Engine Issues
Skeletal mesh LODs never stream up under SSAM: FSkeletalMeshSceneProxy caches ForceStreamedLOD and is never re-gathered
UE - World Creation - Worldbuilding Tools - Jul 29, 2026UE 5.8, cooked build, SSAM enabled (s.StreamableAssets.UseSimpleStreamableAssetManager=1, required by FastGeo). Symptom: characters spawn at a crude LOD and can never stream up for the lifetime of ...
Can't cook a subsequent release when the project uses World Partition.
UE - Core - Data Pipeline - Cooker - Jul 14, 2026A licensee reported getting errors when cooking a subsequent release. The bug is a side effect of CL44557776 which changed the behavior when dealing with generated packages in UCookOnTheFlyServer::G ...
Scene capture allocate internal render target
UE - Graphics Features - Apr 13, 2018Issue during the CapturingScene phase when having Nanite mesh as source component for HLOD Generation
UE - World Creation - Worldbuilding Tools - Feb 17, 2026When generating the textures for Approximate HLOD layers, the Nantie geometry is very low resolution, resulting in the captured textures fitting the actual HLOD geometry poorly. This creates visual ...
User receiving crash when compiling & saving blueprints on Mac
UE - Gameplay - Blueprint - May 14, 2015User receiving crash when compiling & saving blueprints. Log Error: (SIGSEGV: invalid attempt to access memory at address 0x0) User also supplies a Stack Trace Image in his answerhub post. ...
Editor Crashes when creating a function in Child Anim Blueprint
OLD - Anim - Mar 16, 2017Editor Crashes when creating a function in Child Anim Blueprint. Regression: This issue did NOT occur in 4.13.2 Binary build ...
Update DefaultEngine.ini file when open project settings tab.
Tools - Nov 12, 2019There are no changes to the parameters in the .ini file, just the file has been updated. Source control becomes dirty by re-saving the file. ...
Mesh painting on staticmesh doesn't always apply Colors to All LODs
UE - Editor - Content Pipeline - Asset Build - Apr 18, 2022See the video [Link Removed] ...
Physics Constraint Component loss of accuracy
UE - Runtime - Simulation - Mar 6, 2025Physics Constraint Component has lost accuracy between Unreal versions 5.2 and 5.4 (and up). When measuring the exact distance between rigid bodies constrained by a Physics Constraint Component, the ...
[CrashReport] UE4Editor_PropertyEditor!SDetailSingleItemRow::OnArrayDrop() [sdetailsingleitemrow.cpp:172]
Tools - Oct 10, 2017This is a trending crash coming out of the 4.18 previews. Users have not provided any descriptions of their actions when the crash occurred. The callstack shares similarities to [Link Removed] whi ...