Thats kind of what I have been going for so far yeah. As people can guess I'm not to hot on particles yet, so all I can see so far that could make a difference are: 1. I can find the attribute that sets when the emitter should begin emitting, but there doesnt seem to be one that sets a frame for the emitter to stop 2. Rate / partilces per second. This varies how much comes out. I need it to be a high figure so in render you see a good sized 'puff' of dust coming up. I need a sudden burst of many particles, that stops quickly afterwards - are particles even the best job for this? Thanks as always