In article <3875ec85@news.povray.org>, ron### [at] povrayorg wrote:

> My guess is 1.  I don't think noise3d suffers from the same problems
> as bozo and other patterns.  Try making your bounding box larger.

Actually, it does, but it doesn't show up in most images because the 
flat area is in the center of the blobs formed. This simple isosurface 
demonstrates the problem:
isosurface {
   function {y - noise3d(x*2, 0, z*2)*0.33}
   eval
   max_gradient 1.1
   threshold 0
   bounded_by {box {<-2,-2,-2>, < 2, 2, 2>}}
   accuracy 0.001
   texture {
      pigment {color rgb < 0.095, 0.45, 0.2>}
   }
}

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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