* Creates the <code>Lens</code> used in the Cornell Box.
* @return The <code>Lens</code> used in the Cornell Box.
*/
private static Lens createLens() {
TransformableLens lens = new TransformableLens(
PinholeLens.fromHfovAndAspect(2.0 * Math.atan2(0.25 / 2.0, 0.35), 1.0));
lens.rotateY(Math.PI);
lens.translate(new Vector3(278.0, 273.0, -800.0));
return lens;
}