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bentway23

FLIP colliders flickering

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So after a very lengthy FLIP sim I'm finding that my colliders are arbitrarily flickering in and out and disappearing altogether. I had done various tests--this happened a lot with lower res settings but seemed to stabilize at the final sim resolution--until frame 240 (of 250).

The problem appears to be in the static object itself creating the collision geo. It's set to use volume collisions, mode is volume sample, division method by size at 0.005 division size. The object is an animated person at scale (about two units = 2 meters tall), this setting was about as large as I could go and not lose details.

The .abc itself is imported and unpacked. The same object is used elsewhere to drive a pyro sim and it's working fine there.

How can I ensure that my colliders don't just disappear?

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Posted (edited)

Make sure your collision object has no holes in it. Most characters do have holes (such as the eyes, mouth etc) that you may need to fill. A polyfill node ,set to single polygon, often is all you need.

Edited by Atom

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That did the trick, and the colliders seem to actually be cooking faster (but that could be my good mood talking). Thanks!

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