Seeing your body parts coming into and out of view is critical. That's subtle but necessary to really fool your brain. I've always been amazed how much first-pe

Seeing your body parts coming into and out of view is critical. That's subtle but necessary to really fool your brain. I've always been amazed how much first-person games are more like a camera moving through space than a body. That said, you can do a decent job hacking the brain without body parts, but they're really powerful. I remember testing a VR elevator that lifted me 100 feet into the air. I felt like I was off the ground but when looking down I didn't see my feet. That lack of reality ruined the illusion. It created a representational void where there shouldn't have been one.