constructor( element ) {

			super();
			this.element = element || document.createElement( 'div' );
			this.element.style.position = 'absolute';
			this.element.style.pointerEvents = 'auto';
			this.addEventListener( 'removed', function () {

				this.traverse( function ( object ) {

					if ( object.element instanceof Element && object.element.parentNode !== null ) {

						object.element.parentNode.removeChild( object.element );

					}

				} );

			} );

		}
Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs