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Collision VDB caching when simulating with substeps


art3mis

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If your simulation is using substeps can anyone confirm whether its necessary to also cache your source collision VDB's with substeps (ie using $FF instead of just $F) ?

The cached collision VDB's then being referenced by the Static Object DOP in your DOP network.

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Yea,  (if its moving) that's why it has $FF as the default. You can test it yourself. If you only cache $F and you go to the global animation options and uncheck integer frame values and a value like 0.1 and scrub through the time line in the dopnet on the non-integer frames the collision object will not move on those frames because there are no substeps when loading the cache (turn off display geometry and view the collision guide).

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