When you simulate a model that contains a VR Sink block, your default viewer opens and displays the virtual scene. For more information on setting your default viewer, see Set the Default Viewer.
Multiple instances of the viewer can exist on your screen. A viewer appears each time you select the File menu New Window option in the Simulink® 3D Animation™ Viewer. This feature is useful if you want to view one scene from many different viewpoints at the same time.
If you close the viewer window, you can reopen it. In the Simulink model window, double-click the VR Sink block.