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 ...

Generate all Bodies on Selected Bones Does Not Generate Single Convex Hulls Uniformly

Occurs 5/5 Times Regression does not occur in //UE4/Release-4.27.2 @ CL 18319896 When 'Generating All Bodies' on a bone the single convex hull does not generate uniformly.  ...

Shader Complexity shows checkerboard screen in Android ES 3.1 render

Changing the view mode to Shader Complexity while in Android ES 3.1 preview render will show a black and grey checkerboard in the viewport.  This does not happen in UE 4.27 ...

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] ...

Nanite enabled Foliage stays visible when Foliage is set to Hide All

Nanite enabled Foliage stays visible when Foliage is set to Hide All. ...

Crash in FPrimitiveSceneProxy::UpdateInstances_RenderThread in CitySample

The following check fails occasionally: check(InstanceCustomData.Num() == (NumCustomDataFloats * InstanceSceneData.Num())); I was not able to narrow down more precise repro steps, but it appears t ...

Selecting other components after selecting a Spline Component's control point keeps the transform gizmo and functionality at the Spline Control point

Selecting other components after selecting a Spline Component's control point keeps the transform gizmo and functionality at the Spline Control point Repro Rate: 4/4 Tested this in //UE4/Release-4 ...

Roughness map detail is lost in shadowed areas with Lumen enabled

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 ...

Geometry Collection behavior does not change when changed by BP

Reproduced 6/6 times. This seems to affect all "Set" functions for Geometry Collection Components, such as Setting Object Type from Static to Dynamic, or changing Collision Type. ...