Sounds like a job for a Perlin noise function. I can send you a 1D Perlin noise
macro (i.e. it generates floats in a fractal noise pattern). I haven't figured
out how to make it work in more dimensions. If you think it still might be
useful, give me a shout.

Margus

Robert J Becraft wrote:
> 
> Attached is my first round at adding bumps to a planet object.  It takes
> about 3 minutes to render.
> 
> PROBLEM:
> 
> Using the rand(X) function in POV, I find that it creates too even a
> distribution in the placement of all the objects in the picture.  Notice
> that the band of green bumps are fairly evenly spaced around the globe.
> 
> Does anyone have a better rand function that will get me better clumps of
> land mass???
> 
> Robert J Becraft
> aka cas### [at] aolcom
> 
>  [Image]

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