Electronics engineers are turning to projection techniques to display images along walls, floors and ceilings to create the illusion of a virtual environment when accompanied by a headset. For example, The CAVE at the University of Illinois-Chicago lets visitors don a pair of special glasses and immerse themselves in a virtual environment that tracks their point of view and even allows groups of people to take part as passive observers.
Similar to projections and displays, tracking systems are letting engineers closely monitor and analyze a user’s point of view through software, cable tethers and other peripherals. Changes in eye and body movements prompt a computer to transmit the corresponding images that appear to alter the environment according to our position. Tracking systems have most notably been used in film and television production, but this has since given way to newer technologies with a more dedicated focus on VR. (excerpt from #ImAmEngineer on https://www.imanengineer.com/)