The program can load and unload point cloud files dynamically depending on the Navisworks navigational position. If you turn on Dynamic Point Cloud Loading from the toolbar then the relevant point cloud file is loaded and appended to the Navisworks model if it is inside a predefined volume based on current navigational position. After you have exited from that area, the attached point cloud file will be unloaded and removed and a new one will be appended if it matches the new navigational position.