So recently I have been trying to learn RBDs and am creating an animation where a rock with movement that I hand animate rises up through the compressed soil-like ground. However when my rock touches the ground layer it results in a more explosive behavior then anticipated. It almost seems like it is snapping the ground open and sending chunks flying. I was wondering if there is a way to control how explosive RBD interactions are or at least to dampen the effect realistically?

Haven't had a chance to look at your hip file yet, but try using the damping DOPs, and/or increasing the number of substeps.

Also, there is a page in the docs about mixing keyframe/dynamics, which might address your situation.

Hi,

I think the split impulse parameter on the RBD solver (supposing you're using bullet) does the trick…

Cheers