Marc Regis Hannah was born in Chicago in 1956. He studied electrical engineering at the Illinois Institute of Technology with support from a Bell Laboratories scholarship, graduating in 1977. Graduate study at Stanford followed. There, an interest in three-dimensional graphics brought him into contact with engineering professor Jim Clark, setting the stage for work that would reach several industries.
In 1982, Hannah, Clark and five other partners founded Silicon Graphics, commonly known as SGI. The company developed computer hardware and software for demanding graphics tasks. Clark's Geometry Engine was an important part of that history, and Hannah worked on improving the systems built around such technology, the rendering hardware that turns three-dimensional models into images on screen.
Illinois Tech describes Hannah as a pioneer of three-dimensional rendering hardware used for applications including the design of the Boeing 777, imagery in Jurassic Park and the Nintendo 64 gaming system. Aircraft designers, filmmakers and game makers used related computing capabilities for very different purposes.
Hannah left SGI in 1997 as vice president and chief scientist. His later work included consulting and leadership positions at other technology businesses. Illinois Tech records roles at Omniverse Digital Solutions, which worked in online media; Pulsent, which developed video-compression technology; and SongPro, which worked on portable media-player cartridges and content for the Nintendo Game Boy.
His public record also connects technology with education and representation. A 1998 National Urban League conference program featured Hannah among African American innovators discussing technology. BlackPast describes his participation in the development of Chicago's traveling Black Achievers in Science exhibition.
In May 2021, Illinois Tech inducted Hannah and broadcast-technology leader Andrea Berry into its Hall of Fame. The university identified him as a Life Trustee, a role also listed in its current board roster.
Rendering hardware earned its place by speed. A complex three-dimensional scene drawn by software alone could take a machine hours; specialized hardware drew the same geometry fast enough for designers and animators to work interactively.
SGI's workstations became standard equipment in 1990s visual-effects studios and industrial design offices, a market built by the founders' engineering choices rather than by any single product.
