That looks very good, but still isosurfaces seem more efficient to me.  You have
more control over the fine structure then (you seem to use a normal for that). 
Furthermore it's much easier to synchronize shape and texturing.  

Anyway i hope you publish the code when you finished it.  

BTW, what's the rendering time/memory use for these ?

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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