It's not Doom but it allows to walk in a 3d world environment https://matthew.rayfield.world/articles/games-and-graphics-in-popup-url-bars/#:~:text=The%203D%20R

It's not Doom but it allows to walk in a 3d world environment https://matthew.rayfield.world/articles/games-and-graphics-in-popup-url-bars/#:~:text=The%203D%20Room https://matthew.rayfield.world/articles/games-and-graphics-i...