Operating system: Xubuntu 18.04
Graphics card: Titan X (Pascal)
Broken: 2.80 63ac7c799c8
Short description of error
Imported alembic objects with animated hair strands render incorrectly.
The cache doesn't get read properly and no updates happen in between frames when rendering, resulting in a render where the animation is stuck on the first frame of the cache.
Problem persists between Eevee and Cycles. Regular mesh based caches work fine, this only seems to affect imported hair/curves.
Tried animating the frame parameter too, as well as adding a driver, but it doesn't help. Every render is static on the first frame of the cache.
Exact steps for others to reproduce the error
- Create hair system
- Animate said hair system (dynamics / forces)
- Export Hair to Alembic
- Import Alembic with hair animation
- Hair animation doesn't update on render