I've recently re-watched John Carmack's 2004 Quakecon keynote (https://www.youtube.com/watch?time_continue=602&v=OOVUZZr655o https://www.youtube.com/watch?time_

I've recently re-watched John Carmack's 2004 Quakecon keynote (https://www.youtube.com/watch?time_continue=602&v=OOVUZZr655o https://www.youtube.com/watch?time_continue=602&v=OOVUZZr655...), which happened during the Doom 3 launch. In that keynote, he mentions that he didn't see any differences between stencil and shadow maps. He mentions that he experimented a lot with both approaches, before settling for stencil shadows which were much faster. I got curious about that statement, since shadow maps tend to look much different. I also knew that he left part of the experimental renderer in the GPLed code. So, I've decided to go on that rabbit hole of Doom 3 graphics, specifically Carmack's experimental renderer and ended up implementing his approach, as well as adding some poisson disc sampling and fixed the peter panning: https://github.com/klaussilveira/exp-dhewm3 https://github.com/klaussilveira/exp-dhewm3 I also spend a lot of time on archaic game engines. I like to call it software archeology.