"Those are all Quake 2 textures with a bit of messing about to fit the theme - since doing this I've figured out how Quake 2 RTX materials work and modded it to load higher resolution models in maps so could improve on this a lot. There are a few free photorealistic texture packs out there that include stuff like that but would need some adjustment (roughness/specular, normal and metal/chrome maps) to make them materials in Quake 2 RTX." -Rroff
"A collection of Quake II RTX screenshots from the first half of 2021 — singleplayer, deathmatch, Action Quake, DDay mod, etc., courtesy of the Quake II RTX Steam Community."
"Presenting some badass Quake 2 backgrounds from Grieve, a moderator at the legendary mapping forum, The Quake2 Café. In addition, check out some screenshots of Grieve's recommended Goth maps for Quake 2."
"QUAKE II — the most anticipated game of the year. Internet play has 200 Deathmatch Capability. Larger, mission based levels. Fully interactive environments. Superior enemy AI. Futuristic (sci-fi) setting. AVAILABLE NOW."
"Our Chaos Theory: fire a BFG in 1997 and you get CHAOS in 2021… The reason Quake and Quake II get more coverage than other games is simply because of the way in which gamers embrace playing them. No other games have been mutated in so many ways as Quake and Quake II have. So if you're sick of hearing the word Quake — bad luck. You'll be hearing a lot more of it in the future."