// cpt-city: tl/power-0.80 (ggr)
//
// Nonlinear greyscales
//
// author: Thomas Lotze
// copyright: Free to use
// year: 2004
// url: https://phillips.shef.ac.uk/pub/cpt-city/tl
#declare power_0_80 =
color_map {
  [0.00000 color rgbf <1.0000,1.0000,1.0000,0.0000>]
  [0.00490 color rgbf <1.0000,1.0000,1.0000,0.0020>]
  [0.00979 color rgbf <1.0000,1.0000,1.0000,0.0039>]
  [0.00979 color rgbf <1.0000,1.0000,1.0000,0.0078>]
  [0.01468 color rgbf <1.0000,1.0000,1.0000,0.0098>]
  [0.01957 color rgbf <1.0000,1.0000,1.0000,0.0118>]
  [0.01957 color rgbf <1.0000,1.0000,1.0000,0.0157>]
  [0.02445 color rgbf <1.0000,1.0000,1.0000,0.0176>]
  [0.02933 color rgbf <1.0000,1.0000,1.0000,0.0196>]
  [0.02933 color rgbf <1.0000,1.0000,1.0000,0.0235>]
  [0.03420 color rgbf <1.0000,1.0000,1.0000,0.0255>]
  [0.03906 color rgbf <1.0000,1.0000,1.0000,0.0275>]
  [0.03906 color rgbf <1.0000,1.0000,1.0000,0.0314>]
  [0.04392 color rgbf <1.0000,1.0000,1.0000,0.0333>]
  [0.04878 color rgbf <1.0000,1.0000,1.0000,0.0353>]
  [0.04878 color rgbf <1.0000,1.0000,1.0000,0.0392>]
  [0.05363 color rgbf <1.0000,1.0000,1.0000,0.0412>]
  [0.05847 color rgbf <1.0000,1.0000,1.0000,0.0431>]
  [0.05847 color rgbf <1.0000,1.0000,1.0000,0.0471>]
  [0.06331 color rgbf <1.0000,1.0000,1.0000,0.0490>]
  [0.06815 color rgbf <1.0000,1.0000,1.0000,0.0510>]
  [0.06815 color rgbf <1.0000,1.0000,1.0000,0.0549>]
  [0.07298 color rgbf <1.0000,1.0000,1.0000,0.0569>]
  [0.07781 color rgbf <1.0000,1.0000,1.0000,0.0588>]
  [0.07781 color rgbf <1.0000,1.0000,1.0000,0.0627>]
  [0.08263 color rgbf <1.0000,1.0000,1.0000,0.0647>]
  [0.08744 color rgbf <1.0000,1.0000,1.0000,0.0667>]
  [0.08744 color rgbf <1.0000,1.0000,1.0000,0.0706>]
  [0.09225 color rgbf <1.0000,1.0000,1.0000,0.0725>]
  [0.09706 color rgbf <1.0000,1.0000,1.0000,0.0745>]
  [0.09706 color rgbf <1.0000,1.0000,1.0000,0.0784>]
  [0.10186 color rgbf <1.0000,1.0000,1.0000,0.0804>]
  [0.10665 color rgbf <1.0000,1.0000,1.0000,0.0824>]
  [0.10665 color rgbf <1.0000,1.0000,1.0000,0.0863>]
  [0.11144 color rgbf <1.0000,1.0000,1.0000,0.0882>]
  [0.11623 color rgbf <1.0000,1.0000,1.0000,0.0902>]
  [0.11623 color rgbf <1.0000,1.0000,1.0000,0.0941>]
  [0.12101 color rgbf <1.0000,1.0000,1.0000,0.0961>]
  [0.12578 color rgbf <1.0000,1.0000,1.0000,0.0980>]
  [0.12578 color rgbf <1.0000,1.0000,1.0000,0.1020>]
  [0.13055 color rgbf <1.0000,1.0000,1.0000,0.1039>]
  [0.13532 color rgbf <1.0000,1.0000,1.0000,0.1059>]
  [0.13532 color rgbf <1.0000,1.0000,1.0000,0.1098>]
  [0.14008 color rgbf <1.0000,1.0000,1.0000,0.1118>]
  [0.14483 color rgbf <1.0000,1.0000,1.0000,0.1137>]
  [0.14483 color rgbf <1.0000,1.0000,1.0000,0.1176>]
  [0.14958 color rgbf <1.0000,1.0000,1.0000,0.1196>]
  [0.15432 color rgbf <1.0000,1.0000,1.0000,0.1216>]
  [0.15432 color rgbf <1.0000,1.0000,1.0000,0.1255>]
  [0.15906 color rgbf <1.0000,1.0000,1.0000,0.1275>]
  [0.16379 color rgbf <1.0000,1.0000,1.0000,0.1294>]
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  [0.17324 color rgbf <1.0000,1.0000,1.0000,0.1373>]
  [0.17324 color rgbf <1.0000,1.0000,1.0000,0.1412>]
  [0.17796 color rgbf <1.0000,1.0000,1.0000,0.1431>]
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  [0.18737 color rgbf <1.0000,1.0000,1.0000,0.1510>]
  [0.19207 color rgbf <1.0000,1.0000,1.0000,0.1529>]
  [0.19207 color rgbf <1.0000,1.0000,1.0000,0.1569>]
  [0.19677 color rgbf <1.0000,1.0000,1.0000,0.1588>]
  [0.20145 color rgbf <1.0000,1.0000,1.0000,0.1608>]
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  [0.21082 color rgbf <1.0000,1.0000,1.0000,0.1725>]
  [0.21549 color rgbf <1.0000,1.0000,1.0000,0.1745>]
  [0.22016 color rgbf <1.0000,1.0000,1.0000,0.1765>]
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  [0.22482 color rgbf <1.0000,1.0000,1.0000,0.1824>]
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  [0.30319 color rgbf <1.0000,1.0000,1.0000,0.2510>]
  [0.30774 color rgbf <1.0000,1.0000,1.0000,0.2529>]
  [0.31229 color rgbf <1.0000,1.0000,1.0000,0.2549>]
  [0.31229 color rgbf <1.0000,1.0000,1.0000,0.2588>]
  [0.31684 color rgbf <1.0000,1.0000,1.0000,0.2608>]
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  [0.32591 color rgbf <1.0000,1.0000,1.0000,0.2686>]
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  [0.33044 color rgbf <1.0000,1.0000,1.0000,0.2745>]
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