Operating system: Linux-5.4.0-45-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.51.06
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-01 12:39, hash: rB526fbdec3b6a
Short description of error
Motion Blur is missing when the imported Alembic contains vertex normals.
Exact steps for others to reproduce the error
- Unpack the ZIP and open the attached blend file:
- Press F12:
- The object on the left has (a bit but still visible) motion blur, the one on the right doesn't.
The only difference between the two Alembics is that the first one doesn't have the "N" attribute on its vertices.