// orthographic lens uses aspect ratio as field of view.
// Could be used to render a planar image map, for example
camera
{
  orthographic                // also place at end or after right and up
  location < 0.5, 0.5, -10 >  // position (might have problems if too near an object)
  right x*2 up y*1.5          // aspect or field of view (x*2, y*1.5, is 4 by 3 units)
  look_at  < 0.5, 0.5, 0 >    // field
}
