Materials are broken when merging a mesh with another that has negative scale
Licencee states that bisMirrored in FMeshMergeHelpers::TransformRawMeshVertexData seems to be involved.
Does not occur in 4.17
Re-confirmed for 4.22 regression in 4.23 MAIN @ CL 6074663
1. Import or Create a mesh with multiple material channels (attached)
2. Place Mesh
3. Place another mesh, mirror it with Scale(-1,1,1), Scale(1,-1,1), Scale(1,1,-1), or Scale(-1,-1,-1)
4. Merge both actors with default settings
5. Observe strangeness with materials in merged mesh
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-56953 in the post.
| 2 |
| Component | UE - World Creation - Worldbuilding Tools - HLOD |
|---|---|
| Affects Versions | 4.18, 4.19, 4.22.1 |
| Target Fix | 4.22.2 |
| Created | Mar 27, 2018 |
|---|---|
| Resolved | May 2, 2019 |
| Updated | Oct 15, 2019 |