height_field {
   gif "fract001.gif"
   pigment { color rgb <1, 1, 1> }
   translate <-0.5, -0.5, -0.5>
}

disc {
   <0, -0.75, 0>, y, 2
   pigment { checker color rgb <0.1, 1, 0.1> color rgb <0.4, 1, 0.4> scale 1/4 }
}

light_source { <-1, 2, 0> color rgb <1, 1, 1> }

camera {
   location <-1, 0.5, -1>
   look_at <0, 0, 0>
}