Game Groups > 3D Engine: id Tech 1

Games using the id Tech 1 graphics engine (formerly known as the "DOOM engine") (original or modified) by id Software.

Doom's source code was released to the public on 23 December 1997 under a license allowing non-commercial 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.

Trivia

• 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.

Related engines

• GZDoom (unofficial source port)
• Wolf3D
• Quake
• Quake II
• id Tech 3 / with Übertools
• id Tech 4
• id Tech 5
• id Tech 6
• id Tech 7