Unreal Engine Issues

Engine crashes when building GPU Lightmass in large scenes

Engine crashes when building GPU lightmass in larger scenes. This does not occur on smaller maps like the Unreal Engine Templates. I was able to reproduce this issue in CitySamples SmallCity map. T ...

Screen Space Reflections have a visible lag on opaque materials compared to transparent/additive materials.

Screen Space Reflections have a visible lag on opaque materials compared to transparent/additive materials. See [Link Removed] ...

USDStage - Issues importing USD prims with single time-sampled attributes

There may be an issue with USD prims with time-sampled attributes - or at least an issue of user expectations.    When importing from a USDStageActor into Unreal, via the USDStage GUI, if prims hav ...

Grouped actors missing material element slots in details panel after reselecting

Distance field shadows follow user's movement, cutting in and out.

Some of the shadows appear to get cut off by user's movement though level, popping in and out of the field of vision oddly. GPU dump located in [Link Removed] Issue observed on //UE5/Release 5.0 @ ...

Ensure tripped: "Template Mismatch during attachment."

[Source Effect Chain][Blueprint] -Add Source Effect To Preset Chain Has No Effect

Add Sound Effect to Preset Chain has no effect on the Source Effect Chain. [Link Removed] ...

Distance field shadows cut out early in the second eye

Distance field shadows have artifacts in the second eye in XR as shown on the picture. [Link Removed] ...

Imported FBX or USD tree - visually missing geometry when converted to Nanite

When the static mesh tree (brought in thru USD/FBX) is converted to Nanite - the tree thins, or rather visually thins - the thinner branches and/or leaves do not render in the viewport and go missin ...

Old iTunes DLL causes UBT to fail on startup