ht blue
		const groundColor = 0xB97A20; // brownish orange
		const intensity = 1;
		const light = new THREE.HemisphereLight( skyColor, groundColor, intensity );
		scene.add( light );

		const gui = new GUI();
		gui.addColor( new ColorGUIHelper( light, 'color' ), 'value' ).name( 'skyColor' );
		gui.addColor( new ColorGUIHelper( light, 'groundColor' ), 'value' ).name( 'groundColor' );
		gui.add( light, 'intensity', 0, 5, 0.01 );

	}

	function resizeRendererToDisplaySize( renderer ) {

		const canvas = render