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laeuchli

Planet sized sky dome

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Dear All, I have planet with an atmosphere that I'm currently fairly happy with. I'd now like to add some procedural clouds that can be views from space as well as planet side. Since I would like to have it run on PS 2.0 compatiable cards, I'm having some problems seeing how to proceed. I intitally tried a tiled 128x128x128 3D noise texture which I was going to use in my shader to create clouds. I've used this method happily before for volume clouds, but it didnt yield good results for a sky dome sized amount of clouds, it seems the 128^3 isnt high enough resolution. I then though I'd create the noise in the shader, but this runs to a higher instruction count then I'd like, esp for 4D noise which is what I'd really like. So anyway, can someone direct me to the best way of procedurally generating clouds on that scale? Regards, Jesse

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Just draw some spheres with cloud cubemap around planet, with alpha blend.
Really,one cubemap quite enough,without shaders and 3D noise...

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Well I want to animate the clouds though...to do that I pretty much need 4D noise if I want to do it without artifacts, although I'm open to other methods of generating good large scale animated cloud structures that map well onto spheres.

[Edited by - laeuchli on June 18, 2008 12:25:35 PM]

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