@alois@functional.cafe I'm making a video about it, although I suspect that my usual approach won't do a good job of explaining how it works. The basic principle is that there's a Nipkow drum backed by a very high refresh rate LED panel. Each hole in the drum is a pinhole projector for the image behind, and scanning them means that there's a dense array, reproducing a light field. Wherever your eye is, it will encounter the correct set of light rays for that viewpoint.