"PM 2Ring" <nomail@nomail> wrote in message
news:web.42cbc31df229687430757dd90@news.povray.org...
> Here's the isosurface version. As expected, it renders much slower than
the
> normals version. If you make the accuracy much smaller than 0.0075, you
> will have to push the max_gradient right up and render speeds become
> glacial, especially with high AA settings.

> #declare IsoDepth = 0.035;
> isosurface{
>   function {f_sphere(x,y-2,z-2, 2 + IsoDepth*(fnPig(x,y,z).x-1))}
>   contained_by{sphere {<0, 2, 2>, 2}}
>   accuracy 0.0075
>   max_gradient 9.9
>
>   texture {t3}
>   interior { ior 1.455 }   //So Fresnel works
> }
>

thanks, I'll play with it some. there are some small differences between
what I had tried and what you have posted. i need to figure out why they are
important. (my tries had me cranking max_gradient up to > 50)

-r

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