Hey, I was browsing ken perlin's NYU page (he's the dude that invented perlin noise) and I came across this nifty cloud builder applet: http://mrl.nyu.edu/~perlin/experiments/vpuff/ Make sure to turn the textures on...very fast and nice clouds... The source code is linked from that page, anyone who knows java want to code a version that will build a cloud at 512x512 resolution on a black background for bryce purposes? Here's the main page, lots of cool stuff to play with here. http://mrl.nyu.edu/~perlin/