Unreal Engine Issues
Unreal Engine Issues
UAnimNotify::Notify not called during USkeletalMeshComponent interaction with UPhysicsControlComponent when PhysicsBlendWeight is zero
UE - Anim - Synthesis - Physics Control - Mar 30, 2025UAnimNotify::Notify not called during USkeletalMeshComponent interaction with UPhysicsControlComponent when PhysicsBlendWeight is zero. The licensee has provided his analysis of the code: If USkelet ...
Change of rotation axis when switching solver
UE - Simulation - Physics - Apr 17, 2025This alteration was introduced in the 'Found CL' field - and is likely an unintentional side effect of adding SIMD to the solver. There is a repro project attached, open up 'TestMap' and run to see ...
CitySample - Level MassCrowd - interactions with SmartObjects/ContextualAnimScene is broken in 5.5
UE - AI - Apr 9, 2025The 5.5 version of the CitySample project, particularly the MassCrowd scene, was not properly maintained. The previously working functionality of NPCs being able to sit on a bench is now broken. CAS ...
VSM SMRT SamplesPerRay CVars behave differently if groom assets are present leading to a potential full-scene shadow
UE - Graphics Features - May 28, 2025When a groom is present, setting any SamplesPerRay SMRT CVar to zero results in an unexpected complete shadow projected from the light. ProjectLight() in VirtualShadowMapProjection.usf has addition ...
EditCondition tag not working for FInstancedStruct property in UDeveloperSettings
UE - Editor - Workflow Systems - May 30, 2025When using EditCondition to control the editability of FInstancedStruct properties in a class derived from UDeveloperSettings, the condition is only partially respected. Specifically: A TArray<FIns ...
TInstancedStruct used in native actor class loses reference to Instanced UObject after BP recompilation
UE - Foundation - Jun 25, 2025When a TInstancedStruct contains a UObject marked with EditInlineNew and DefaultToInstanced, the reference is lost after compiling the Blueprint but only when the struct is part of a native Actor cl ...
Custom Primitive Data color widget not applying correctly to static mesh components in Blueprint editor.
UE - Rendering Architecture - Materials - Jul 23, 2025Context Custom Primitive Data is used to store custom data in an index array that is accessible through Blueprint and code. This allows for variations across instances of the same mesh without needi ...
Default level Sun Disc precision issue on Android
Docs - Samples - May 2, 2016Sun disc in the default level has precision or depth fighting issues ...
Building lighting fails on Linux with custom heightmaps in Russian localization
UE - Platform - Linux - May 28, 2015Building lighting fails when the engine localization is set to Russian (RU). Have not reproduced internally. This issue seems to be related to [Link Removed] since it occurs in the Russian localiz ...
Blurry VR Editor icon when using the small icons settings in the Editor
UE - Editor - Workflow Systems - Jun 20, 2016Blurry VR Editor icon when using the small icons settings in the Editor ...