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Hi, all...need to do a shatter effect where the outer 'shell' of a static (for now) character/figure crumbles to reveal a different material/surface beneath. Been doing a lot of testing with a simple torus as it's a fair representation of the tubular topography of most of the figure (arms, legs, torso, etc). I feel I've finally got a good grasp on all the fracturing basics, but for the life of me I can't keep the outer shell fragments from interpenetrating with the underlying shell. I've tried: Increasing the DOP network substeps Increasing the rigid body solver substeps Switching the RBD packed object geo representation from Convex to Concave Altering the collision padding based on what it does to the guide geometry Increasing the number of fragments in connection with all of the above The changes either lead to little difference or in cases where I kick up the substeps and subsequently (I think) the precision, the fragments do the old-style 'exploding off the surface' thing. At this point, I have to wonder...in this situation should I just switch to the RBD solver? I'm okay getting hammered on sim time if I know it's going to work in the end. Oh, and a question about the collision padding...is that designed to pad the fragment intersection with other surfaces, each other, or both? Any help would be great. Really been banging my head against the wall on this one. -- moltenCrazy Shatter Tests - Torus - 02.hiplc