heyas; stick to the topic, you silly moderator, you! :) (btw, axe and spike made good tutorials on making a rim, go try them!!) oh, and speaking of caustic gels on lights.... well, you can't actually do that, per se. however, you can put the caustic material on a plane/square and stick it in front of your light. i make leafy shadows with gels like that all the time.