[kbr2000]

Cool indeed. A spin on it (also using POV-Ray), but using a photo (texture on an object) and animated (rotating that object, the texture, or the mirrors -- I forgot) in [0] and [1].

[0] https://www.youtube.com/watch?v=UJaBspDXgzs [1] https://www.youtube.com/watch?v=Zc5uEwwr6S8