// stereo view:
#declare Eye_Distance =
    pow( -1, frame_number ) * 0.4;
  // pow( -1, frame_number ) =
  //   "-1" for left eye's view ,
  //   "+1" for right eye's view;
// stereo starts: frame_number = 1
// odd frame numbers 1, 3, 5, ... = right
// even frame number 2, 4, 6, ... = left

// non-stereo view (frame_number = 0 )
#if( frame_number = 0 )
#declare Eye_Distance = 0;
#end //---------------------------------
//--------------------------------------
#declare Camera_Position=<2.5,3.5,-1.5>;
#declare Camera_Look_At  = <0,1.5,0>;
#declare Camera_Angle    =  65 ;
//--------------------------------------
camera{
  location Camera_Position
    + Eye_Distance/2
    * vnormalize(
        vcross(
         Camera_Look_At-Camera_Position,
         <0,1,0>
        )// vcross
      )// vnormalize
  right    x*image_width/image_height
  angle    Camera_Angle
  look_at  Camera_Look_At
} // end camera

; POV-Ray version 3.6 / 3.7
; Stereo Animation ini sample file.
Antialias=On
Antialias_Threshold=0.3
Antialias_Depth=3

Input_File_Name=Stereo_Image_.pov

Initial_Frame=1
Final_Frame=2

Initial_Clock=0
Final_Clock=1
Cyclic_Animation=on
Pause_when_Done=off