4.2.11  The Camera-setup

The only thing left is the camera definition, so that POV-Ray can calculate the image correctly:

  camera { orthographic location -z*2 look_at 0 }

Why "2"? As the default direction vector is <0,0,1> and the default up vector is <0,1,0> and we want the up direction to cover 2 units, we have to move the camera two units away.