1993 Doom gets ray tracing, for real

No joke, a modder has added full ray tracing support to the original Doom, and you can play through all of the first three episodes right now

Doom (1993) Ray Tracing

“Can it run Doom” will never be the same, thanks to new ray-tracing mod

Doom: Ray Traced mod enables raytracing in almost 30 year old classic FPS game

Doom (1993) Ray-Tracing in UltraWide

Doom (1993 video game) - Wikipedia

30-year-old Doom is Getting Beautiful Thanks to Ray Tracing Mod

Doom mod lets you play with ray tracing

DOOM Realm - Art, videos, guides, polls and more - Game Jolt

Classic Doom with ray tracing? Sure – Destructoid

Can it run Doom” will never be the same, thanks to new ray-tracing mod