The fact that all you need is a depth map of what you'd like to create makes me wonder if anyone's ever linked something like this up to a video game engine to make possibly the least visually pleasing and least accessible game out there.
https://www.rockpapershotgun.com/cross-your-magic-eyes-to-pl...
https://www.pcgamer.com/omdo-is-what-happens-when-you-turn-d...