3D Engine: id Tech 1
Group DescriptionGames using the id Tech 1 graphics engine (formerly known as the "DOOM engine") (original or modified) by iD Software, Inc..
Doom's source code was released to the public on December 23, 1997 under a license allowing noncommercial use; in 1999, it was re-released under the GNU General Public License. This led to the development of numerous source ports adding new features to the engine.
- It was the first 3D game engine that allowed variable heights for floors and ceilings. However, it only allowed one floor or ceiling per area, making multi-storied levels impossible.
- John Carmack experimented with 16 bit textures, but found the overhead unacceptable for the game.
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Front cover for The Complete DOOM Accessory Pack
Front cover for Heretic
Front cover for Hexen: Beyond Heretic
Front cover for DOOM
Front cover for D!Zone 150
Screenshot from The Complete DOOM Accessory Pack
Screenshot from Heretic
Screenshot from D!Match
Screenshot from Hexen: Beyond Heretic
Screenshot from DOOM