Matt Giwer <jul### [at] ijnet> wrote in message news:3A0DD6C8.C2A3624D@ij.net...

> For the images of earth, the way I have created clouds is with a
> thresholded fractal plasma with a graphics program. That produces
> "clustered noise" vice random. I have seen a procedural plasma routine
> but I don't remember where.

I've found a couple of sites on perlin noise and 'm going to
play around with that for a while

> Hint: In playing around with the image maps, I found inverting color
> and flipping the image made even earth hard to recognize. So if it is
> hard to get a good one procedurally you can use the good ones more than
> once.

Interesting. thanks for the info

Gail
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