// cpt-city: lb/mp/Tire_Tread (PspGradient)
//
// Gradients for graphic design from Loadboy Ltd.
//
// author: Loadboy Ltd
// copyright: Free to use
// year: 2008
// url: https://phillips.shef.ac.uk/pub/cpt-city/lb/mp
#declare tire_tread =
color_map {
  [0.00000 color rgbf <0.2118,0.2078,0.2275,0.0000>]
  [0.05005 color rgbf <0.2784,0.2745,0.2941,0.0000>]
  [0.12988 color rgbf <0.0157,0.0118,0.0353,0.0000>]
  [0.17993 color rgbf <0.0627,0.0667,0.0863,0.0000>]
  [0.21997 color rgbf <0.0824,0.0863,0.1059,0.0000>]
  [0.38989 color rgbf <0.2549,0.2588,0.2745,0.0000>]
  [0.51001 color rgbf <0.3961,0.3961,0.3961,0.0000>]
  [0.64990 color rgbf <0.0078,0.0078,0.0157,0.0000>]
  [0.82007 color rgbf <0.4235,0.4235,0.4157,0.0000>]
  [0.90991 color rgbf <0.4863,0.4667,0.4549,0.0000>]
  [1.00000 color rgbf <0.2627,0.2667,0.2667,0.0000>]
}