Here's a different approach to stereoscopic imaging without having to parse 
twice or use the clock setting. I don't know enough about lenses but I think 
someone might be able to tweak this to work correctly. I used a repeated 
spherical camera normal to get 2 images.

//----------------------------------------------------

#include "colors.inc"

global_settings {
  assumed_gamma 1.0
  max_trace_level 5
}

// ----------------------------------------


camera {
  right x*image_width/image_height
  location  <0.0, 0.5, -4.0>
  look_at   z

          normal {spherical /*scale <10,10,01>*/ translate <.5,.5,-.5>  // 
pattern modifier
          warp {
                    repeat x           // repeat direction
                }
                translate -.5*y
                scale <.7,.7,10>
                  //
          }

}


sky_sphere {
  pigment {
    gradient y
    color_map {
      [0.0 rgb <0.6,0.7,1.0>]
      [0.7 rgb <0.0,0.1,0.8>]
    }
  }
}

light_source {
  <0, 0, 0>            // light's position (translated below)
  color rgb <1, 1, 1>  // light's color
  translate <-30, 30, -30>
}

// ----------------------------------------

plane {               // checkered floor
  y, -1
  texture
  {
    pigment {
      checker
      color rgb 1
      color blue 1
      scale 0.5
    }
    finish{
      diffuse 0.8
      ambient 0.1
    }
  }
}

sphere {              // reflective sphere
  0.0, 1
  texture {
    pigment {
      color rgb <0.8,0.8,1.0>
    }
    finish{
      diffuse 0.3
      ambient 0.0
      specular 0.6
      reflection {
        0.8
        metallic
      }
      conserve_energy
    }
  }
}

//-----------------------------------------------------------------
-- 
-Nekar Xenos-

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