Hey,
I do have a little problem with flip collisions. I'm simulating a layer of caramel on top of which I want to add a layer of chocolate. The mesh of the first layer I converted to a deforming object. Collision volume and everything looks just fine. Unfortunately flip is going crazy when it touches this surface.

make sure you don't compute velocity on you Collision Source SOP as I can imagine your collision geo has changing pointcount and possibly it already has correct v from previous sim

Hi There

I had a look at the hip you posted on odforce, I think it's your friction and bounce variables on the col vol for the caramel.

cheers
Nigel.