Question: Adrian Carmack is a founder of id Software, along with which other aerospace engineer?
Context: Rage (stylized as RAGE) is a first-person shooter video game developed by id Software, released in October 2011.  It was first shown as a tech demo on June 11, 2007, at the Apple Worldwide Developers Conference, and was officially announced on August 2, 2007 at QuakeCon.  "Rage" uses id Software's id Tech 5 game engine, and was the final game released by the company under the supervision of founder John Carmack. The making of "Doom", id Software's video game released on December 10, 1993, began in late 1992. " Doom" raised the bar for realism in video games with its then-advanced 3D graphics—central to its success was the new game engine by John Carmack, whose main advances included texture mapping of all surfaces, variable light levels, and floors at varying altitude.  The world in "Doom" materialized through the level design of John Romero, Sandy Petersen and Tom Hall and the artwork of Adrian Carmack, Kevin Cloud and Gregor Punchatz. John D. Carmack (born August 20, 1970) is an American game programmer, aerospace and virtual reality engineer.  He co-founded id Software.  Carmack was the lead programmer of the id video games "Commander Keen", "Wolfenstein 3D", "Doom", "Quake", "Rage" and their sequels.  Carmack is best known for his innovations in 3D graphics, such as his Carmack's Reverse algorithm for shadow volumes, and is also a rocketry enthusiast and the founder and lead engineer of Armadillo Aerospace.  In August 2013, Carmack took the position of CTO at Oculus VR, which in 2014 became a subsidiary of Facebook. Paul Howard Steed, Jr. (November 6, 1964 – August 11, 2012) was a video game modeller and artist.  He worked for Origin Systems, Electronic Arts, id Software, Wild Tangent, Microsoft's Xbox, Atari, and Exigent.  He created artwork or models for several prominent game series including "Wing Commander" and "Quake".  He was employed by id Software until he was fired in retaliation for conflict over the creation of "Doom 3" (according to John Carmack). Blackroom is an upcoming FPS title from the independent studio Night Work Games, created by former id Software developers John Romero and Adrian Carmack.  The game was planned to be crowdfunded on the Kickstarter platform, but the project was cancelled in april 2016.  The game is set to launch during the Winter quarter of 2018. Adrian Carmack (born May 5, 1969) is one of the four founders of id Software, along with Tom Hall, John Romero, and John Carmack (no relation).  He had worked there as an artist.  He was a major stock owner of id Software until he left the company. Alfonso John Romero (born October 28, 1967) is an American director, designer, programmer, and developer in the video game industry.  He is best known as a co-founder of id Software and designer for many of their games, including "Wolfenstein 3D", "Dangerous Dave", "", "Doom" and "Quake".  His game designs and development tools, along with new programming techniques created and implemented by id Software's lead programmer John D. Carmack, led to a mass popularization of the first person shooter, or FPS, in the 1990s.  He is credited with coining the FPS multiplayer term "deathmatch". Kevin Cloud is a computer games graphic designer from Shreveport, Louisiana.  He was hired in 1992 by id Software to work as an assistant artist to the then lead artist, Adrian Carmack.  Prior to that, he was employed by Softdisk, where several other id founders worked.  During part of his employment at Softdisk, he worked as an Illustrator for Softdisk's Commodore 64 disk magazine "Loadstar".  Cloud was artist and co-owner until the ZeniMax Media merger in 2009. id Tech 5 is a proprietary game engine released by id Software.  It follows its predecessors, id Tech 1, 2, 3 and 4, all of which have subsequently been published under the GNU General Public License.  It was seen as a major advancement over id Tech 4.  The engine was first demonstrated at the WWDC 2007 by John D. Carmack on an eight-core computer; however, the demo used only a single core with single-threaded OpenGL implementation running on a 512 MB 7000 class Quadro video card. <ref name="http://www.Gaminggroove.com posting"> </ref> id Tech 5 was first used in the video game "Rage", followed by "", "The Evil Within" and "". id Software LLC ( ; see Company name) is an American video game developer headquartered in Dallas, Texas.  The company was founded on February 1, 1991, by four members of the computer company Softdisk, programmers John Carmack and John Romero, game designer Tom Hall, and artist Adrian Carmack (no relation to John Carmack).  Business manager Jay Wilbur was also involved.
Answer: John D. Carmack