copy( source ) {

		super.copy( source, false );

		const levels = source.levels;

		for ( let i = 0, l = levels.length; i < l; i ++ ) {

			const level = levels[ i ];

			this.addLevel( level.object.clone(), level.distance, level.hysteresis );

		}

		this.autoUpdate = source.autoUpdate;

		return this;

	}
Whether the LOD object is updated automatically by the renderer per frame
or not. If set to `false`, you have to call {@link LOD#update} in the
render loop by yourself.

@type {boolean}
@default true