Nanite spline meshes deforming along the world normal vector do not use the same world normal as a non-Nanite spline mesh. This results in inconsistent behavior between Nanite and non-Nanite spline meshes with the same Material applied.
1. Download the attached test project and open.
2. Observe the traditional static and spline meshes (white), and the Nanite static and spline meshes (red)
3. Observe that the Nanite spline meshes do not deform in the same way as the traditional spline meshes, despite using the same Material, which only offsets along the World Normal.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-348635 in the post.
| 1 |
| Component | UE - Graphics Features - Nanite |
|---|---|
| Affects Versions | 5.7 |
| Target Fix | 5.8 |
| Fix Commit | 49973095 |
|---|
| Created | Oct 13, 2025 |
|---|---|
| Resolved | Jan 20, 2026 |
| Updated | Jan 23, 2026 |