The Ghost of RubangB on 11 November 2010
It's funny how Doom was technically 2.5D. It was 2D sprites in a "3D environment," but it wasn't true 3D. It was more like the original Super Mario kart. You couldn't have spiral staircases or bridges that you could go over or under. It was a 2D map, but you could program each section of the map to have a top and bottom, just by entering a number. So you wouldn't sculpt the map with 3D shapes like you do with Quake and everything afterwards. You actually just draw flat rectangles, and then add numbers to create tall rooms, short rooms, alcoves, doorways, and stairways. And yet, with all those limitations, those maps from Doom 1 and Doom 2 are still the best FPS maps.
