Nicolas Alvarez wrote:
> I put the image directly into a heightfield, and I think I got the correct
> height, but only at 16 bits. I can't see any way (without hacking the
> code) to get 24 bits of precision in a heightfield.
> 
> The only way to put data in a heightfield without passing a filename is
> using bitmap functions (function 200,200 { ... }), and those also support
> only 16-bit.

But using some creative coding, I can get an isosurface out of a
heightfield. I lose almost all interpolation though; it looks like a
heightfield without the "smooth" parameter.

Isosurface function:

function(x,y,z) {
  y -
  Map(x,y,z).red +
  Map(x,y,z).green / 256.0 +
  Map(x,y,z).blue / 65536.0
}

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