Edit: I'm aware now that Doom didn't use affine texture mapping. I'm also aware that many of the games following Doom used portal based rendering, while still having files with a .BSP format. Join the Discord: An exploration into how Doom's graphics work and how Doom affected the gaming industry back in 1993. Chapters: 0:00 Preliminary explanation 0:53 Intro 4:30 Wolfenstein 8:00 Doom 25:37 Addendum #Doom #Doom1993 #DoomBSP Sources: Doom visualization tool: Headless Doom: Node Building Video: :// R Schumacher & Air Force Human Resources Laboratory. Training Research Division 1969, Study for applying computer-generated images to visual simulation, Air Force Human Resources Laboratory, Air Force Systems Command, Brooks Air Force Base, Tex. Fuchs, H, Kedem, ZM & Naylor, BF 1980, ‘On visible surface generation by a priori tree structures’, ACM SIGGRAPH Computer Graphics, vol. 14, no. 3, ~fuchs/publications/ . Special Thanks: ID Software CoD Black Ops: Cold War The Doom Community