In VR, you could just be a floating one-dimensional eyeball in virtual space (like our initial Diorama camera), a normal human being, or maybe some full-bodied space creature. We have focused on walking around the scene and discussed how to set the camera height to the eye level. The implication was that someone experiencing VR has a sense of their own body. However, the camera height actually only makes sense when there's also a ground plane or some other stable reference point in your vicinity. When you're flying around like a bird, plane, or Superman, then the body height may not matter much.
Yet in the physical world, we all really do have bodies, and our brains kind of expect that. Issues surrounding the sense of self can get very psychological, philosophical, and even religious. Also, it's mind-bending what VR might eventually be able to do in this regard. For now, we should focus on what we need in order to help make our VR experiences comfortable for our...