There used to be places where they had Doom running in something similar to a lightbox (At SARA Amsterdam). The game was basically projected on 3 planes (left,

There used to be places where they had Doom running in something similar to a lightbox (At SARA Amsterdam). The game was basically projected on 3 planes (left, right, front). The box/cube would be something like 2m - 3m cubed, and you would stand in the middle. I've never had the privilege of actual playing. I think this is why the 90 degree angle is in such a way. So basically a a real-life 3d skybox, if you're familiar with 3d-engine terms [1] [1] https://en.wikipedia.org/wiki/Skybox_(video_games) https://en.wikipedia.org/wiki/Skybox_(video_games)