That was my first thought as well, that analog media are generally reversible, but if I understand the parent post it isn’t really what he’s talking about - rat

That was my first thought as well, that analog media are generally reversible, but if I understand the parent post it isn’t really what he’s talking about - rather that the image from a camera is enough to render the scene from the perspective of the lamp that lit the initial image. That’s very different from a projector, or say the way a mic and speaker are essentially the same thing.