Unreal Engine Issues

Mesh Paint mode's Texture Paint has obvious artifact with UV seams

Mesh Painting Texture Paint tool can miss some pixels along UV seams, even with "Enable Seam Painting" set to True. This appears to be because of the difference between rasterization and sampling. ...

Make sure dynamic computed offset for index and vertex buffers are 16 byte aligned

FStaticMeshCompiler::FinishCompilation stalls when compiling multiple meshes.

Calling "FStaticMeshCompiler::FinishCompilation" on multiple assets simultaneously can cause a hang. Also tested on //UE5/Release-5.5, CL: 36784631 ...

Iris - Missed subobject destruction can cause incomplete client state

From UDN assigned to [Link Removed]  ...

Calling GetMaterial during compile on load can cause the material shader to fail to compile

Calling UStaticMeshComponent::GetMaterial() during a Blueprint compile on load can cause the Material shader to fail to compile because GetMaterial will trigger a PostLoad call on that Material and ...

Array of structs does not animate sub properties correctly in Sequencer.

Support for animating arrays of structs should either be disabled, or supported. ...

Substrate- black outline appears when using sharp contrast mask to blend slabs

Substrate materials have a thin border of black pixels between slabs. These lines can be made more apparent by changing the Diffuse Albedo color of the two slabs to pure white. This will remove the ...

MP4 file causing export hang

There is something specific to this MP4 file that prevents media from being exported. When it is included in a project file, Twinmotion sticks on 'Estimated time left computing' on export and must b ...

GPU crash dump triggered with Intel H/HX processors

Some users have recently reported 'GPU crash dump Triggered' crashes launching, importing, or performing simple actions. Communicating with one user, general GPU TS has not helped(check for OS/drive ...

Crumbling Geometry Collections do not render for one frame when child clusters crumble

Crumbling Geometry collection do not render for one frame when child clusters crumble. In the repro project a 4 particle GC is told to crumble. The single GeometryCollectionActor is then split into ...