pigment {
  pavement
  [ number_of_sides VALUE | number_of_tiles VALUE | pattern VALUE |
    exterior VALUE | interior VALUE | form VALUE |
    PATTERN_MODIFIERS ]
 } // end pigment

box{ <-1,0,-1>,<1,1,1>
     pigment{
         pavement
           number_of_sides 3 //  3 triangle,  4 quadrat, 6 hexagon
           number_of_tiles 1 //  (1 to 5 or 6)
           pattern 1 // from 1 to the maximum relevant VALUE
           // corners:  0 = sharp, 1 = bevelled, 2 = rounded
             exterior 0 // 0, 1 or 2; Not used for hexagon.
             interior 0 // 0, 1 or 2
           form 0//  0, 1, 2
           color_map{ [ 0.00 color rgb<1,1,1>*1 ]
                      [ 0.20 color rgb<1,1,1>*1 ]
                      [ 0.20 color rgb<1,1,1>*0 ]
                      [ 0.40 color rgb<1,1,1>*0 ]
                      [ 0.50 color rgb<1,1,1>*1 ]
                      [ 0.90 color rgb<1,1,1>*0 ]
                      [ 1.00 color rgb<1,1,1>*0 ]
                    } // end color_map
           scale 0.25
        } // end pigment
 } // end of box ------------- }