Also, I've never done animations in VWD until recently, and with all but the smallest meshes I get an explosion that looks like the attached. However, the static simulation is fine, and the mesh I'm using is very clean and even quads. I've tried cranking down the collision distance, and gave it 150 frames of animation, but even with different meshes I get the attached explosion. Strangely, they always look the same. Any ideas? Thanks! Explosion.JPG