e helper
			light.target.updateMatrixWorld();
			helper.update();
			// update the light's shadow camera's projection matrix
			light.shadow.camera.updateProjectionMatrix();
			// and now update the camera helper we're using to show the light's shadow camera
			cameraHelper.update();

		}

		updateCamera();

		class DimensionGUIHelper {

			constructor( obj, minProp, maxProp ) {

				this.obj = obj;
				this.minProp = minProp;
				this.maxProp = maxProp;

			}
			get value() {

				return this.obj[ this.max