Mo-Sys mechanical engineer Rohan Stent (right) plays virtual reality beach volleyball with Roger Ryder in a booth to demonstrate StarTracker VR by the company Mo-Sys at the Augmented World Expo in Santa Clara, Calif., on June 1, 2018. StarTracker uses reflective stickers that can be stuck to the ceiling or a net while an upwards-looking camera calculates the position of the subject from the stickers. AWS is a large augmented reality and virtual reality conference and expo.