Alain wrote:

> A difference of two identical blobs, one of whitch is translated a small 
> amount down, may be what you are looking for. The blobs are made of a 
> serie of cylinder components. Intersect it with a box to get straight 
> edges.
> Other than that, you may try a parametric or an issosurface. A marble 
> base pattern using a cubic_wave to have smooth curves, it should have a 
> fairly low max_gradient making it relatively fast.
> Once you have your sheet, just add some texture to it.

Heh heh, once again the POV newsgroup anticipates my question before I 
even ask it!

I got a very nice *new* piece of sheetmetal by using a thin sphere_sweep 
scaled on one axis to make the sheet, but I wanted to make one that's 
warped and bent.  Your blob idea should work well.

I thought of isosurface but don't have a clue where to start. Guess I'm 
"isochallenged".

RG

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