Unreal Engine Issues
Unreal Engine Issues
If a mesh contains more than 32 material slots, it can cause a hash collision when computing the Raytracing CachedMeshCommandHash
UE - Graphics Features - Ray Tracing - Oct 11, 2025RayTracing - Nanite Foliage assets do not display shadows properly when painted with Foliage Tool
UE - Graphics Features - Ray Tracing - Aug 18, 2025Crash when a Deferred Decal (Translucent) base material has a Nanite Override (Masked Surface) Material and the mesh has Nanite + Ray Tracing enabled.
UE - Graphics Features - Ray Tracing - Aug 14, 2025A crash occurs when Nanite override material instance is used in a project with Ray tracing enabled where: 1 The Material assigned to the static mesh uses Deferred Decal / Translucent and the Nani ...
Landscape raytracing geometry always updates every frame
UE - Graphics Features - Ray Tracing - Apr 11, 2025LOD 0 Landscape meshes are always updated in FLandscapeComponentSceneProxy::GetDynamicRayTracingInstances because* r.RayTracing.Geometry.Landscape.LODsUpdateEveryFrame* (GLandscapeRayTracingGeometry ...
Memory Leak When Raytracing Enabled with Specific Rendering Settings
UE - Graphics Features - Ray Tracing - Apr 8, 2025When a shipping build is packaged using specific rendering settings a memory leak can be observed. The licensee has noted that this leak presents as a 10MB per hour increase in RAM usage. It has a ...
Raytraced lights with Source Length > 0 behave incorrectly with Megalights
UE - Graphics Features - Ray Tracing - Mar 26, 2025When Megalights is enabled, light can leak into areas that should be occluded for lights with smallish (5.0) source length and source size. [Image Removed][Image Removed] This was taken with r.Ray ...
The Starter Contents SM_Statue exists in a bad state, leading to crashes when trying to open levels where it is referenced
UE - Graphics Features - Ray Tracing - Feb 18, 2025The SM_Statue exists in a bad state leading to a crash when it is loaded or anything that references it is loaded, e.g. Minimal Default level in the Starter Content. It can be deleted as a temporar ...
Editor/Game Ensure hit with RayTracing enabled on AMD GPU
UE - Graphics Features - Ray Tracing - Feb 4, 2025A Static Mesh asset will trigger an ensure when generating building the ray tracing acceleration structure on AMD GPUs. ...
GPU Crash from invalid SRV in CreateShaderResourceView due to integer underflow
UE - Graphics Features - Ray Tracing - Jan 15, 2025The GPU crashes after the ray tracing geometry builder attempts to create a shader resource view with an invalid offset. ...
GPU Crash from invalid SRV in CreateShaderResourceView due to integer underflow
UE - Graphics Features - Ray Tracing - Jan 13, 2025The GPU crashes after the ray tracing geometry builder attempts to create a shader resource view with an invalid offset. ...