Dale B has some good points. Other things to consider.... Once you have an animation rendered as seperate images, you can then convert them to video using your favorite video editor and a freeware LOSSLESS codec called Lagarith, found here: http://lags.leetcode.net/codec.html Lossless compression will maintain EXACT image quality and allow an efficient work flow, versus uncompressed video files which will be VERY large and may tax your hardware as you try to use them. It's best to work with lossless (or uncompressed) media data whenever possible. Once your project is complete, you then convert to a final "delievery format" such as DVD, Flash, Xvid/DivX, etc. good luck jdc