Call me offended, call me jaded, but my real guess is that you haven't played with volumetrics yet. One can create any chaos-induced cloud effect in Bryce. If you want real clouds, like for example, ones that you have seen in the sky outside your house, take a photo. If you want true fractal-random cloud schemes, I suggest using the DTE inside of the Bryce 5 Skylab. Also, I've been able to reproduce millions of real-sky effects with a few layers of volume slabs... Another option is to create a skysphere, a-la every other pathetic program, and play with volumetrics there. The snake is black, and it's eye's are drops of blood.