! ! camera configuration four view ! ! camera camera1 from 0 0 5 to 0 0 0 up 0 1 0 viewport 0 0 0.5 1.0 projection perspective field angle 30 clip 0.1 20 ! near far camera camera2 from 5 0 0 to 0 0 0 up 0 1 0 viewport 0.5 0 1 0.5 projection perspective field angle 30 clip 0.1 20 ! near far camera camera3 from 3 3 3 to 0 0 0 up 0 1 0 viewport 0.5 0.5 1 1 projection perspective field angle 30 clip 0.1 20 ! near far