// Lights for ring-and-abacus seal.
// Mostly from top right

#declare lights_aim = < 0.0, abacus_bottom_Y + 0.1, 0.0 >

// From upper right:

light_source {
  <+20.0, +80.0, +19.0>
  color rgb 0.15 * <1,1,1>
} 

light_source {
  <+18.0, +70.0, +22.0>
  color rgb 0.30 * <1,1,1>
} 

light_source {
  <+16.0, +65.0, +25.0>
  color rgb 0.30 * <1,1,1>
} 

light_source {
  <+14.0, +55.0, +28.0>
  color rgb 0.33 * <1,1,1>
}

// Frontal illumination:

light_source {
  <+10.0, +70.0, +05.0>
  color rgb 0.28 * <1,1,1>
  //  spotlight
  //  point_at lights_aim
  //  radius (1.2/75)*(180/pi)
  //  falloff (2.0/75)*(180/pi)
}