> 
> [...]
> 
> Sort of, I currently have 6 differents ways to tesselate an object:
>  2 based on marching tetrahedrons, using intersection test (IIRC);
>  4 based on marching cube, using insideness and various way to do the triangles;
>  (but for the latest 2, I still need to check the PD aspect of the tesselation,
>  because what I can do ok in my kitchen might not be ok in exported code.)
> 
> All workings fine with sphere/box/cone/cylinder/torus, but still need to check
> with more fancy objects (such as julia_fractal, blob, CSG and so on...).
> 

How about adaptive (curvature or distance dependant) methods.  See for
example:

http://www.cs.queensu.ca/home/jstewart/papers/cga01.html

I think some kind of adaptation would be possible with a marching
algorithm too.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
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Last updated 06 Feb. 2002 _____./\/^>_*_<^\/\.______

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