Mat = new THREE.MeshPhongMaterial( { color: '#CA8' } );
		const mesh = new THREE.Mesh( sphereGeo, sphereMat );
		mesh.position.set( - sphereRadius - 1, sphereRadius + 2, 0 );
		scene.add( mesh );

	}

	class ColorGUIHelper {

		constructor( object, prop ) {

			this.object = object;
			this.prop = prop;

		}
		get value() {

			return `#${this.object[ this.prop ].getHexString()}`;

		}
		set value( hexString ) {

			this.object[ this.prop ].set( hexString );

		}

	}

	{

		const skyColor = 0xB1E1FF; // lig