Samuel Benge wrote:
> 
> The patchwork is already done. On his webpage,
> http://www.cip.physik.uni-muenchen.de/~wwieser/render/povray/patches/isoacc-patch/ 
> 
> Wolfgang describes what seems to be a perfect fix for a common problem 
> with rendered isosurfaces: black spots and 'chopped up' surfaces.

That is not true.  Black spots on isosurfaces can have multiple reasons, 
the most common being an insufficient max_gradient.  The idea of using 
interpolation for the final root position is good but it is not a 
panacea for all kind of isosurface problems.  In other words it will 
only improve the results if the isosurface root finder has already 
successfully found the root.

Christoph

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