removeLevel( distance ) {

		const levels = this.levels;

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

			if ( levels[ i ].distance === distance ) {

				const removedElements = levels.splice( i, 1 );
				this.remove( removedElements[ 0 ].object );

				return true;

			}

		}

		return false;

	}
Removes an existing level, based on the distance from the camera.
Returns `true` when the level has been removed. Otherwise `false`.

@param {number} distance - Distance of the level to remove.
@return {boolean} Whether the level has been removed or not.