Samuel Benge wrote:
> As my mind wanders, so do my experiments. I've been meaning to do 
> something like this for quite a while, but just never did.
> 
> The scene contains three separate isosurfaces which make up the bark of 
> the stump. Since the functions for them involved blobbing and surface 
> displacement, I found it expedient to optimise the calculations a little 
> by adjusting their individual bounding boxes.

Nice.  You know i tried something similar some time ago:

http://www-public.tu-bs.de:8080/%7Ey0013390/pov/pict/stump.jpg


Christoph

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