Unreal Engine Issues
Unreal Engine Issues
Performance slowdown when ray tracing is disabled due to SetResidencyPriority
UE - Rendering Architecture - RHI - Jul 17, 2025When a game is compiled with ray tracing disabled (D3D12_RHI_RAYTRACING=0) and the GPU the game is running on becomes low on VRAM, frame time is negatively impacted and doesn't recover. The D3D12_RH ...
Editor-only blueprints like WidgetBlueprint are not added to cooked asset registry class hierarchy
UE - CoreTech - Aug 10, 2022Both the Asset Registry and Asset Manager look for all subclasses of UBlueprintCore and use that to search for blueprint classes and construct an inheritance hierarchy. This always works in editor b ...
New Viewport Resolution setting increases every time a new PIE window is launched
UE - Editor - UI Systems - Slate - Sep 2, 2022When closing a PIE viewport, we write the size back to the New Viewport Resolution setting in case the window was resized during play. However, we do not account for the window border, and write bac ...
NiagaraEditor timeline folders are not saved correctly
UE - Niagara - Feb 8, 2023It works correctly in 5.0.3. ...
Shadows get attenuated by Volumetric Fog excessively on mobile
UE - Platform - Mobile - Oct 31, 2024URuntimeVirtualTextureComponent::RequestPreload not working for some edge cases
UE - Rendering Architecture - Jul 15, 2025A licensee has reached out to us to inform us that the logic for preloading at times fails to account for adaptive virtual textures when the requested mip level is not in the shared AllocatedVirtual ...
HighResShot results depend on viewport size
UE - Graphics Features - Jul 19, 2022Licensee wants to take screenshots that are more than the size of the viewport ingame. However, they are having trouble because the results depend on the size of the viewport. ...
Material Instance used textures list shows sample textures used as Input Preview Textures within Material Functions
UE - Rendering Architecture - Materials - Sep 22, 2022ProceduralMesh created by ImpostorBaker cannot be saved.
UE - Graphics Tools - Modeling Tools - Mesh Editing - Jan 12, 2023Clearing the DynamicMaterial reference will save it, but several licensees have inquired about it, so it would be kind if it were corrected. ...
Mesh deformed by Cable Component does not output velocity
UE - Simulation - Physics - Aug 7, 2023The velocity when moving the root is output, but it seems that the velocity for each deformation is not output. Since motion blur and TSR use velocity, problems such as ghosting may occur. ...