I tried plopping in a twist and shear shader into the cloud shader, AFAIK it did nothing. Has anyone else tried it with success? I've also tried the strata and outcrops shader on it, to see what it would look like. Shoving a power fractal into clouds seems to have a nice effect though. I wonder what an alpine fractal would result in?
I'll put up my planetary render (with clouds) in a sec, for now here's my first successful 800x600 render, I think the cloud came out ok.
Ooh, and here's my second successful render, I was trying to copy one of Oshyan's sea renders as a lesson on water, I think the waves are too choppy, and they miss that golden glow, but other than that I think I've learnt enough with them to carry on.