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Text File  |  2008-01-23  |  344 b   |  17 lines
  1. surface k3d_imagelayergradient(color zenith = color(0, 0, 1);
  2.                    color sky = color(.5, .5, 1);
  3.                    color ground = color(.6, .6, .1);
  4.                    color nadir = color(0, 0, 0);)
  5. {
  6.   Oi = Os;
  7.  
  8.   if(v < 0.5)
  9.     {
  10.       Ci = Cs * mix(zenith, sky, v * 2.0);
  11.     }
  12.   else
  13.     {
  14.       Ci = Cs * mix(ground, nadir, (v - 0.5) * 2.0);
  15.     }
  16. }
  17.