Hello Fellow Houdini Users, I've been off the grid for quite some time now, but needed some assistance, so here I am. Basically I've done several effects, RBD, Missile launches/impacts, etc etc that I'd like to start adding secondary elements to (ie shockwaves etc etc). So, I'd like to figure out an intuitive way of creating a ring of dust, growing and being pushed outwards fast. The velocity would be based on the normals direction. I've been contemplating to eventually rebuild a solver out of