I am not sure I would consider much of what he did very simple (or easy) compared to what most of us are doing today. The last few chapters of Michael Abrash's

I am not sure I would consider much of what he did very simple (or easy) compared to what most of us are doing today. The last few chapters of Michael Abrash's Black Book is about his work with Quake (he was involved doing some of the graphics code together with Carmack) and it is pretty hardcore low-level advanced things they were doing. Remember they were software rendering everything in the first version. https://github.com/neonkingfr/AbrashBlackBook https://github.com/neonkingfr/AbrashBlackBook And also they did pretty soon support MSDOS, Windows 95, and Linux (and possibly some more platforms?). In addition to supporting software rendering, 3Dfx, OpenGL, and possibly some more 3D API.