nderTarget.texture.generateMipmaps = false;
			pickingRenderTarget.texture.minFilter = THREE.NearestFilter;

			// highlight box

			highlightBox = new THREE.Mesh(
				new THREE.BoxBufferGeometry( 1, 1, 1 ),
				new THREE.MeshLambertMaterial( {
					emissive: 0xffff00,
					transparent: true,
					opacity: 0.5
				} )
			);

			// renderer

			container = document.getElementById( "container" );
			renderer = new THREE.WebGLRenderer( {
				antialias: true,
				alpha: true
			} );
			if ( renderer.extensions.