Hello everyone.
Currently I have done a lot, I think that in a few weeks, I will make about three maps. Such demos. I only make textures with PBR, and Parallax Oclussion to make it realistic. Wait for my work
I’ve learned a lot 
The game will be realistic and there will be a lot of carnage on the roads and cars
And then you add nanite, lumen, and destructible buildings everywhere, and your game will get 40fps on 5090.
My suggestion is do not go all out before you have working gameplay prototype.
It is really huge waste of time to make big level with all fancy stuff you want there, just to realize no computer can run it.
I know this very well, that’s why I’m on high settings, not higher epic and cinematic