I set up an Oculus Rift at Burning Man Australia (Burning Seed, 2013). I put people continuously for 10 hours into the Rift Coaster and the alpha version of SoundSelf. SoundSelf is software that creates a visual and audio feedback of the users vocalised input via a microphone. It is profound in Virtual reality! I airbrushed over the projected images with white paint, so as the night wore on, the projected images would reflect more light.

https://www.youtube.com/@RogerEssigArtist