'px.jpg',
			cubeTexturePath + 'nx.jpg',
			cubeTexturePath + 'py.jpg',
			cubeTexturePath + 'ny.jpg',
			cubeTexturePath + 'pz.jpg',
			cubeTexturePath + 'nz.jpg'
		], function() {
			cube_texture = (new PMREMGenerator()).prefilter(forwardRenderer, cube_texture);
		
			const skyBox = new SkyBox(cube_texture);
			scene.add(skyBox);

			const gui = new GUI();
			gui.add({ version: 'WebGL ' + forwardRenderer.capabilities.version }, 'version').disable();
			gui.add(skyBox, 'level', 0, 8, 1);
		});

		const cam