r composer, renderTarget;
			var renderPass, gammaPass;
			var plane, copyQuad;

			init();
			animate();

			function init() {

				// initialize renderer, scene, camera
				camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.set( 0.0, 5, 5 * 3.5 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0 );

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( win