Unreal Engine Issues
Unreal Engine Issues
Lack of multi-bounce when using software traced lumen radiosity
UE - Graphics Features - Lumen - Apr 4, 2025Certain Lumen Hardware Ray Tracing CVars, when disabled in isolation, will not fall back to tracing the Global Distance Field, because the Global Distance Field is still disabled. The function "Lum ...
Reflection capture doesn't work when using Lumen GI and SSR
UE - Rendering Architecture - Mar 24, 2025Reflection Capture does not appear to work with Lumen + SSR. Licensees have reported that there are cases where they want to combine Lumen GI, SSR and Reflection capture for quality and performance ...
Shading error after flipping normals on mesh
TM - Interoperability - Mar 11, 2025As far as I can guess is that in the initial state of the object, the vertex normals are as they come from the DCC, but after the modeling operation they get recalculated somehow that doesn't match ...
Point light leaking throught thin geometry
UE - Graphics Features - Oct 29, 2024In 4.27, ray traced point lights can leak through thin meshes. This bug does not exist in Unreal Engine 5, due to many of the potential rendering areas being fundamentally changed. ...
[Feature Request] Allow bulk-assignment of values during blend profile/mask creation
UE - Anim - Runtime - Oct 16, 2024Users have reported that manually editing each bone when generating blendmasks to be tedious and could be easier with some bulk editing functionality. ...
[Feature Request] Allow bulk-assignment of values during blend profile/mask creation
UE - Anim - Runtime - Oct 16, 2024Users have reported that manually editing each bone when generating blendmasks to be tedious and could be easier with some bulk editing functionality. ...
Decals custom depth/stencil side effect from Lumen
UE - Graphics Features - Oct 15, 2024The order of passes related to Decal rendering (without the DBuffer) and CustomDepth is changed by the CVar "r.Lumen.AsyncCompute", even when Lumen is not enabled. This causes Decal Materials that ...
[PCG] Handle potential deadlock case with UPCGLandscapeCache::GetCacheEntry
UE - World Creation - Procedural Tools - PCG Core - Oct 15, 2024It is possible to get in a rare situation where PCG uses all Background workers while also having all its workers waiting on the FPCGLandscapeCacheEntry DataLock critical section. Since loading of ...
Is there a particle smoke that matches the world lighting 100%?
UE - Niagara - Oct 14, 2024Niagara particle sprites with a Translucent Material are glowing in a completely dark area. This issue is also observed with the deprecated Cascade particles. Particle brightness is also dependent ...
Dark square appears in hair in direction of spotlight when shadows disabled
UE - Graphics Features - Sep 18, 2024A dark square appears in the direction of a spotlight on hair when the spotlight has no shadow. [Image Removed] In UE 5.4 the dark square is visible when the spotlight has no shadow, and a light s ...