Ok I have a cube and I particle instanced it to an emiiter now I want the cube to emit in difffrtent sizes, I have searhed everywhere and I'm doing exactly what there saying but its not working. I select the particle shape and add the radiuspp with a random expression but nothing ever changes on the emmiter. here are screen shots *the green cube https://img832.imageshack.us/img832/...10115100026.png https://img97.imageshack.us/img97/99...10115100221.png https://img97.imageshack.us/img97/98...10115100235.png thx much