Might want to check out Filter->Render->Clouds->PlasmaFollowed by Filter->Distort->Whirl and Pinchhttp://www.galifree.com/misc/whirl.jpg to see a sample.
I use the Plasma filter (in greyscale) for background replacements occasionally.
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Gimp-user maili
Hi,
[EMAIL PROTECTED] (2006-03-27 at 1050.47 -0500):
> I want to create a multicolor pinwheel effect for a
> background, with the arms of each shade radiating out from a hub
> and curved rather than straight. And I want the colors to blend
> into each other as in a gradient. A rainbow gradient is a
