Wow ! The effects are effective ! =)I have a question: what did you use the formula for exactly ? Also, it's too bad there's a bug in the gif export that loses the frames per second settings : the anim appears way too slow ... About the image size . I'd say that if you don't block a thread with the image and that you make efforts to keep it as small as you can, then it's okay . But i think more than 500 ko wouldn't be necessary . litst