// cpt-city: pd/astro/mars_sand_dunes01 (cpt)
//
// Gradients from photographs
//
// author: Piecrust Design
// copyright: Public domain
// year: 2007
// url: https://phillips.shef.ac.uk/pub/cpt-city/pd/astro
#declare mars_sand_dunes01 =
color_map {
  [0.00000 color rgbf <0.0745,0.1020,0.1490,0.0000>]
  [0.02080 color rgbf <0.0706,0.0980,0.1412,0.0000>]
  [0.04170 color rgbf <0.0706,0.0941,0.1294,0.0000>]
  [0.06250 color rgbf <0.0706,0.0980,0.1333,0.0000>]
  [0.08330 color rgbf <0.0745,0.1020,0.1412,0.0000>]
  [0.10420 color rgbf <0.0941,0.1176,0.1608,0.0000>]
  [0.12500 color rgbf <0.1098,0.1333,0.1804,0.0000>]
  [0.14580 color rgbf <0.1255,0.1490,0.1961,0.0000>]
  [0.16670 color rgbf <0.1412,0.1686,0.2157,0.0000>]
  [0.18750 color rgbf <0.1647,0.2039,0.2627,0.0000>]
  [0.20830 color rgbf <0.1882,0.2392,0.3098,0.0000>]
  [0.22920 color rgbf <0.2627,0.3294,0.4078,0.0000>]
  [0.25000 color rgbf <0.3412,0.4157,0.5059,0.0000>]
  [0.27080 color rgbf <0.4078,0.4745,0.5490,0.0000>]
  [0.29170 color rgbf <0.4784,0.5373,0.5961,0.0000>]
  [0.31250 color rgbf <0.4706,0.5176,0.5569,0.0000>]
  [0.33330 color rgbf <0.4627,0.4941,0.5216,0.0000>]
  [0.35420 color rgbf <0.4157,0.4588,0.4980,0.0000>]
  [0.37500 color rgbf <0.3725,0.4235,0.4706,0.0000>]
  [0.39580 color rgbf <0.3569,0.4000,0.4471,0.0000>]
  [0.41670 color rgbf <0.3373,0.3804,0.4275,0.0000>]
  [0.43750 color rgbf <0.3059,0.3529,0.4078,0.0000>]
  [0.45830 color rgbf <0.2745,0.3216,0.3843,0.0000>]
  [0.47920 color rgbf <0.2667,0.3176,0.3843,0.0000>]
  [0.50000 color rgbf <0.2549,0.3098,0.3843,0.0000>]
  [0.52080 color rgbf <0.2431,0.3020,0.3765,0.0000>]
  [0.54170 color rgbf <0.2353,0.2902,0.3647,0.0000>]
  [0.56250 color rgbf <0.2353,0.2902,0.3608,0.0000>]
  [0.58330 color rgbf <0.2353,0.2902,0.3608,0.0000>]
  [0.60420 color rgbf <0.2353,0.2902,0.3569,0.0000>]
  [0.62500 color rgbf <0.2353,0.2863,0.3569,0.0000>]
  [0.64580 color rgbf <0.2392,0.2902,0.3569,0.0000>]
  [0.66670 color rgbf <0.2392,0.2902,0.3529,0.0000>]
  [0.68750 color rgbf <0.2431,0.2941,0.3569,0.0000>]
  [0.70830 color rgbf <0.2471,0.2980,0.3608,0.0000>]
  [0.72920 color rgbf <0.2510,0.2980,0.3569,0.0000>]
  [0.75000 color rgbf <0.2549,0.3020,0.3569,0.0000>]
  [0.77080 color rgbf <0.2627,0.3059,0.3608,0.0000>]
  [0.79170 color rgbf <0.2667,0.3137,0.3647,0.0000>]
  [0.81250 color rgbf <0.2706,0.3176,0.3725,0.0000>]
  [0.83330 color rgbf <0.2745,0.3216,0.3765,0.0000>]
  [0.85420 color rgbf <0.2784,0.3255,0.3804,0.0000>]
  [0.87500 color rgbf <0.2824,0.3294,0.3843,0.0000>]
  [0.89580 color rgbf <0.2902,0.3333,0.3961,0.0000>]
  [0.91670 color rgbf <0.2941,0.3412,0.4039,0.0000>]
  [0.93750 color rgbf <0.2941,0.3412,0.4078,0.0000>]
  [0.95830 color rgbf <0.2941,0.3451,0.4118,0.0000>]
  [0.97920 color rgbf <0.2980,0.3490,0.4157,0.0000>]
  [1.00000 color rgbf <0.3020,0.3529,0.4196,0.0000>]
}