//  A rock texture
//  Last edited on 1998-12-20 16:36:50 by stolfi

//  Requires 
//    texture_rock_color
//  Defines
//    texture_rock

#declare texture_rock = 
  texture{ 
    pigment{ color rgb texture_rock_color }
    finish{ 
      ambient 0.1 
      diffuse 0.9 
      specular 0.50 roughness 0.17
      metallic 0.25
      brilliance 2.5
    }
    normal { granite 0.30 }
    scale 0.30
  }