er.add( data, 'detail', 0, 5 ).step( 1 ).onChange( generateGeometry );

					generateGeometry();

				},

				PlaneGeometry: function ( mesh ) {

					const data = {
						width: 10,
						height: 10,
						widthSegments: 1,
						heightSegments: 1
					};

					function generateGeometry() {

						updateGroupGeometry( mesh,
							new PlaneGeometry(
								data.width, data.height, data.widthSegments, data.heightSegments
							)
						);

					}

					const folder = gui.addFolder( 'THREE.PlaneGeometry' );