	const data = {
						radius: 10,
						detail: 0
					};

					function generateGeometry() {

						updateGroupGeometry( mesh,
							new TetrahedronGeometry(
								data.radius, data.detail
							)
						);

					}

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

					folder.add( data, 'radius', 1, 20 ).onChange( generateGeometry );
					folder.add( data, 'detail', 0, 5 ).step( 1 ).onChange( generateGeometry );

					generateGeometry();

				},

				TorusGeometry: function ( mesh ) {
