Ah, didn't realize you were talking about the globe's clouds
And no, they're not procedurally generated. Just a simple texture with cloud information in one texture channgel and specular information in another color channel, which is then just moving around the globe. So no procedurally generated stuff here, though that may be a great idea. Since it's a shader anyway I could do something with noise I guess. Maybe I'll take a look into this
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