Ernst Fritsch wrote:
> 
> [...]
> 

> principle of that vector and how to chose a vector for a mesh (or if



I think the docs are quite clear about it.  To determine whether a point
is inside or outside the mesh POV-Ray shoots a ray in direction of
'inside_vector' and counts the intersections.  

What this means: If the mesh is perfectly closed the inside_vector won't
influence the render result at all.  It may be though that speed is
influenced but this is a more complicated matter.  If the mesh is not
perfectly closed it may be possible to use it in CSG anyway if you choose
the correct inside_vector.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 13 Aug. 2002 _____./\/^>_*_<^\/\.______

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