The BSP* algorithm used in Doom was research paper material in 1991, and Carmack was among the first to apply it to low performance PC games. * http://en.wikip

The BSP* algorithm used in Doom was research paper material in 1991, and Carmack was among the first to apply it to low performance PC games. * http://en.wikipedia.org/wiki/Binary_space_partitioning http://en.wikipedia.org/wiki/Binary_space_partitioning I keep thinking about the Malcolm Gladwell "Ten thousand hours to expertise" idea, and for Carmack to be looking at this sort of stuff at the age of 22, he basically had to eat sleep and shit computer graphics for years and years on end before he could be in a position to apply this to a computer game.