Unreal Engine Issues

USD Stage - Import loses UV on a skeletalmesh with animation

https://forums.unrealengine.com/t/usd-import-issue-when-trying-to-import-skeleton-with-animation/2718449 I put another png has the user forgot to add theirs. ...

USD Export - crashes when sub level holds level instance

The engine is crashing when the user tries to export from a persistent level with a sub level that contains a level instance. ...

Level Sequence SpotLight USD Exporter Bug

The attributes for spotlights are not exported. ...

Skeletal mesh reimport via legacy import creates duplicate Mesh sockets

Reimporting a Skeletal Mesh via legacy import duplicates mesh sockets. The issue does not reproduce when using the Interchange pipeline. ...

StaticMesh export to FBX crashes if UVElements has more channels than VertexInstanceUVs

As indicated in the repro steps, we have a StaticMesh asset that, for some reason, has a mismatch in their serialized bulk data where:MeshDescription->GetNumUVElementChannels() == 2FStaticMeshConstA ...

Temporal blur artifacts on Geometry Cache Components in Blueprint actor

When a Geometry Collection is in a Blueprint, attached to other components, it can render incorrect motion vectors at some angles. In the test project, any angle that is not a multiple of 45 will re ...

Morph target normals not correctly applied when imported as LOD 0

This is a regression since 5.5 with skeletal meshes where morph target normal/tangent deformation only works when a mesh is imported as a LOD of an existing skeletal mesh, but not when imported as L ...

Skeletal Meshes created in Unreal with only a root bone do not export correctly

Mesh Variation node usage inside macro - lost of material slot name

When using a mesh variation node within a macro instance script, the material slot name of the input mesh is not transferred. On the generated mesh output, the material slot name is "None" ...

Variant Manager: LevelVariantSets asset corruption after rename or duplicate

When renaming or duplicating a LevelVariantSets asset that contains a Director Blueprint, the internal DirectorClass reference becomes mismatched. Although the DirectorBlueprint pointer updates corr ...