Riumplus was inspired by the imagers in the game Riven (the sequel to Myst) to create his own working andotrope for Mysterium 2023.

Here’s the imager from the game:

And here’s his version:

It works by rotating two tablet/phone inside a cylinder that has slits cut in it so you only see the faces of the tablet directly facing you. He has a great writeup on how he created the device, filed a patent for it, and as has a video: