Unreal Engine Issues

ExportMaterialUVDensities() gets the incorrect value where the alpha channel is referenced

ExportMaterialUVDensities() gets the incorrect value where the alpha channel is referenced (e.g. RegisterIndex of the texture is [3] or [7]) because FMeshRenderer::RenderMaterialTexCoordScales() use ...

MaterialTextureScale calculated incorrectly for materials with WorldPositionOffset

When a Material uses WorldPositionOffset, the MaterialTextureScale is calculated incorrectly because FMaterialUtilities::ExportMaterialUVDensities() calls FMeshRenderer::RenderMaterialTexCoordScales ...

World Partition: warnings on editor only actors when running the editor in -server/-game mode

The warning for editor-only actors is unnecessary in these modes where they don't exist. ...

Changing preview mesh appears to affect initial transforms of all control rigs in level viewport

It seems that switching the preview mesh in the control rig editor is affecting the initial transforms in the hiearchies of related control rigs in the level viewport.  This seems to be due to the c ...

422 YUV To RGB Conversion produces incorrect result

"Auto" option in Media IO is not updated correctly when apply is clicked

HLODs with River, Lake, and Ocean not working

Opening Sprite assets or Paper Flipbook crashes the engine in 5.3

Licensee was not able to open any Sprite asset file in 5.3 without it causing a crash. They were able to avoid this by disabling raytracing in the project. ...

[AI] Incorrect collision for USplineMeshComponent

The collision for a spline mesh can be calculated incorrectly. The issue appears to be when Alpha is out of range when calculating the slice transforms at splice offsets. ...

Ray Tracing Translucency in a Post Process Volume breaks in Lit viewmode

Encountered a strange issue where switching to RT Translucency on a PPV would cause it to appear incorrect. However, if you swap the viewmode to Path Tracing, it does appear correct. See screenshots ...