Here's a great trick with IsoSurfaces...   If you deliberately pick an
accuracy setting that is much too low, you can get interesting holes,
patterns, wireframes, and other effects in your surface.

All the cubes on the top are an IsoSurface with nothing but the simple
"cracked" pattern for a function.  The only difference between the three is
the "accuracy" value.


The first used "accuracy 0.001".  This was "accurate enough" to show the
actual isosurface showing the cell structure of "cracked".

The second used "accuracy 0.1".  This produced a cool web/net structure like
the skeleton of the isosurface.

The third used "accuracy 0.5".  This produced a thin cobweb of lines and the
original cells practically vanished.


The cubes on the bottom show the exact same "cracked" texture as a pigment,
media, and transparent pigment just so you can see what I used to make the
isosurfaces above.

   Thoughts/Comments welcome.
   Ron

I'll post source in p.b.s-f if people want.

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