Realistic Clouds?

Hi..

I'm working on a planet filter (you can follow progress here), but working out a realistic cloudcover (earth like) is not very easy - specially winds and turbulence - I've searched the filter lib., but without luck (well, there's lots of blue and white mapped perlin noise, but thats not all there is to it) - check out the real thing:



Below is a preview of the current cloud "engine" - here I use noise distortion to get some kind of turbulence, but I don't think it looks that good really..

I was hoping that some of you wizards might have examples or ideas on how to create more realistic clouds.. it doesn't have to 100% earthlike, but it should be possible to get a bit closer I think..

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Kraellin wrote: i suggested you add a perlin and noise distortion

I agree.....plus you can threshold map it into cell noise/rings profile for some of the swirling effects......