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 D!Zone 150
Front cover for Heretic
Front cover for D!Zone 2
Front cover for Master Levels for DOOM II
Screenshot from The Complete DOOM Accessory Pack
Screenshot from D!Match
Screenshot from Heretic
Screenshot from Master Levels for DOOM II
Screenshot from Magic & Mayhem for Heretic