thanks, i had checked out this tutorial as a possible solution, but i need to have quite a few riplpes that can interact with each other as well. I figured out how to attach a particle to the center of an object with the volumeposition node in xpresso, but i cannot seem to get the single particle to create ripples in the surface. I read elsewhere that i need to drop the particle geometry object into the ripple effect box, but this seems to have no effect for me..
using the same material, but switching to a basic emitter instead seems to work just fine.. its just the TP emitter/particle i am having trouble with..