The wild part about it is that this technique required a very specific prism in the camera in order to work properly, and the tech behind it was completely lost to time and nobody else knew how to make that work, which is why we've primarily had blue/green screens with chunky matte lines ever since. The guys at Corridor Digital managed to recreate the effect pretty authentically, and it's awesome to see the results of their work: https://www.youtube.com/watch?v=UQuIVsNzqDk