"Vahur Krouverk" <vah### [at] aetecee> wrote :L
>
> No, I wrote that! :-) Yes, it is isosurface, like this (POVMan 0.7 is
> required for running it, more complete example comes with
> documentation):
>
> #declare xyf=function{
>     shader{
>         shader_file "menger.slp"
>         "rec_depth" 20
>     }
> }
> isosurface {
>     function {
>         xyf
>     }
>     contained_by { box { -1.0,1.0 } }


    But is it a fractal isosurface or a fractal shader? Seems like a shader
to me, not knowing anything about shaders.

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