Yeah it's from Luke Ross, and all of his mods are very well done and scalable on different hardware. There are different visual presets you can specify, depending on what your pc can handle. I've been able to get it running smoothly on a 1080ti (medium), 2080ti (high), and a 3080ti (ultra)
I can get by pretty smoothly at 6K resolution maxed out on the Pimax 8KX. But cranking it to 8K resolution (native for that headset) is very choppy, but it looks extremely good (like it's the exact same game you see in the screen, but you are inside it with no visual compromises). You are almost literally in the wild west at that point. I see those visuals as a preview for what the next gen will be able to give you. Like a RTX 4090 preview maybe