// cpt-city: pm/pm3d20 (cpt)
//
// Various gradients from Gnuplot: the original default pm3d
// colour gradient by Petr Mikulík from Masaryk University,
// nice rgb schemes listed in “help palette rgbformulae”
// and gradients from the pm3dcolors.dem demo script
//
// author: Petr Mikulik
// copyright: GPLv2
// year: 2006
// url: https://phillips.shef.ac.uk/pub/cpt-city/pm
#declare pm3d20 =
color_map {
  [0.00000 color rgbf <0.0000,0.0000,0.0000,0.0000>]
  [0.01587 color rgbf <0.3686,0.0196,0.0000,0.0000>]
  [0.03175 color rgbf <0.4588,0.0588,0.0000,0.0000>]
  [0.04762 color rgbf <0.5176,0.0941,0.0000,0.0000>]
  [0.06349 color rgbf <0.5608,0.1255,0.0000,0.0000>]
  [0.07936 color rgbf <0.6000,0.1529,0.0000,0.0000>]
  [0.09524 color rgbf <0.6314,0.1804,0.0000,0.0000>]
  [0.11111 color rgbf <0.6588,0.2039,0.0000,0.0000>]
  [0.12698 color rgbf <0.6824,0.2275,0.0000,0.0000>]
  [0.14286 color rgbf <0.7020,0.2510,0.0000,0.0000>]
  [0.15873 color rgbf <0.7255,0.2745,0.0000,0.0000>]
  [0.17460 color rgbf <0.7412,0.2941,0.0000,0.0000>]
  [0.19048 color rgbf <0.7608,0.3137,0.0000,0.0000>]
  [0.20635 color rgbf <0.7765,0.3333,0.0000,0.0000>]
  [0.22222 color rgbf <0.7882,0.3529,0.0000,0.0000>]
  [0.23810 color rgbf <0.8039,0.3725,0.0000,0.0000>]
  [0.25397 color rgbf <0.8157,0.3882,0.0000,0.0000>]
  [0.26984 color rgbf <0.8275,0.4078,0.0000,0.0000>]
  [0.28571 color rgbf <0.8392,0.4235,0.0000,0.0000>]
  [0.30159 color rgbf <0.8510,0.4392,0.0000,0.0000>]
  [0.31746 color rgbf <0.8627,0.4549,0.0000,0.0000>]
  [0.33333 color rgbf <0.8706,0.4706,0.0000,0.0000>]
  [0.34921 color rgbf <0.8824,0.4863,0.0000,0.0000>]
  [0.36508 color rgbf <0.8902,0.5020,0.0000,0.0000>]
  [0.38095 color rgbf <0.8980,0.5176,0.0000,0.0000>]
  [0.39682 color rgbf <0.9059,0.5333,0.0000,0.0000>]
  [0.41270 color rgbf <0.9176,0.5490,0.0000,0.0000>]
  [0.42857 color rgbf <0.9255,0.5608,0.0000,0.0000>]
  [0.44444 color rgbf <0.9294,0.5765,0.0000,0.0000>]
  [0.46032 color rgbf <0.9373,0.5922,0.0000,0.0000>]
  [0.47619 color rgbf <0.9451,0.6039,0.0000,0.0000>]
  [0.49206 color rgbf <0.9529,0.6196,0.0000,0.0000>]
  [0.50794 color rgbf <0.9569,0.6314,0.0000,0.0000>]
  [0.52381 color rgbf <0.9647,0.6471,0.0000,0.0000>]
  [0.53968 color rgbf <0.9686,0.6588,0.0000,0.0000>]
  [0.55556 color rgbf <0.9765,0.6706,0.0000,0.0000>]
  [0.57143 color rgbf <0.9804,0.6824,0.0000,0.0000>]
  [0.58730 color rgbf <0.9882,0.6980,0.0000,0.0000>]
  [0.60318 color rgbf <0.9922,0.7098,0.0000,0.0000>]
  [0.61905 color rgbf <0.9961,0.7216,0.0000,0.0000>]
  [0.63492 color rgbf <1.0000,0.7333,0.0000,0.0000>]
  [0.65079 color rgbf <1.0000,0.7451,0.0000,0.0000>]
  [0.66667 color rgbf <1.0000,0.7569,0.0000,0.0000>]
  [0.68254 color rgbf <1.0000,0.7686,0.0000,0.0000>]
  [0.69841 color rgbf <1.0000,0.7804,0.0000,0.0000>]
  [0.71429 color rgbf <1.0000,0.7922,0.0000,0.0000>]
  [0.73016 color rgbf <1.0000,0.8039,0.0000,0.0000>]
  [0.74603 color rgbf <1.0000,0.8157,0.0000,0.0000>]
  [0.76191 color rgbf <1.0000,0.8275,0.0000,0.0000>]
  [0.77778 color rgbf <1.0000,0.8392,0.0000,0.0000>]
  [0.79365 color rgbf <1.0000,0.8510,0.0000,0.0000>]
  [0.80952 color rgbf <1.0000,0.8627,0.0000,0.0000>]
  [0.82540 color rgbf <1.0000,0.8706,0.0000,0.0000>]
  [0.84127 color rgbf <1.0000,0.8824,0.0000,0.0000>]
  [0.85714 color rgbf <1.0000,0.8941,0.0000,0.0000>]
  [0.87302 color rgbf <1.0000,0.9059,0.0000,0.0000>]
  [0.88889 color rgbf <1.0000,0.9137,0.0000,0.0000>]
  [0.90476 color rgbf <1.0000,0.9255,0.0000,0.0000>]
  [0.92064 color rgbf <1.0000,0.9373,0.0000,0.0000>]
  [0.93651 color rgbf <1.0000,0.9451,0.0000,0.0000>]
  [0.95238 color rgbf <1.0000,0.9569,0.0000,0.0000>]
  [0.96825 color rgbf <1.0000,0.9647,0.0000,0.0000>]
  [0.98413 color rgbf <1.0000,0.9765,0.0000,0.0000>]
  [1.00000 color rgbf <1.0000,0.9882,0.0000,0.0000>]
}