# a comparison of two marble functions
scene (450  x 450 x 255 ) {
  viewpoint:	(150 0 3000)
  lightsource {
    at:		(300 -1000 2500)
    intensity:	1.0
  }
  environment {
    rgb:        (0.0 0.0 0.0)
    shadow:     0.4
  }
  sphere {
    at: (150 100 200)
    radius: 100
    ka: 0.3
    kd: 0.2
    ks: 0.5
    n: 5.0
    marble: (32.0 3.0)
  }
  sphere {
    at: (300 300 200)
    radius: 100
    ka: 0.5
    kd: 0.6
    ks: 0.4
    n: 5.0
    banded:     (32.0 (0.0 0.2 0.1) (0.6 0.4 0.5))
  }
}