I'm rendering an alembic geometry cache animation, that was generated in Houdini. Alembic cache is fine, as proven by Houdini playback itself, Blender view port, as well as Evee render: enter image description hereenter image description here

However, for some of the frames, when rendering in Cycles, I will get triangulation issues, like so:enter image description here I have highlighted the problematic areas. On a single frame, its not very noticeable, but in a video, it jitters unacceptably.

The alembic is an object in Blender, with a MeshSequenceCache modifier. If I apply it, triangulation errors disappear, but the transparent shader will render wrong, with much brighter refraction.

Any thoughts on this? It appears to be some sort of a bug in Cycles, its very annoying.



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