Unreal Engine Issues

Lumen artifacts on splitscreen during camera cuts

A UDN licensee has pointed out that they are seeing unresolved Lumen reflection artifacts when they are running their game in split-screen mode. A video of this behavior is found in the Related tab ...

Generated assets not showing up in world partition level until map reloaded - DirtyActorTracker

Breakpoint on SetText node in WBP PreConstruct triggers editor hang on save

A user reported that when calling SetText on a text widget in a widget blueprint's PreConstruct causes an editor hang when you put a breakpoint on SetText and attempt to save the asset. The issue i ...

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 ...

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. ...