I've been searching all over the internet for FNV mods that enhance or improve the in-game graphic, but I can't seem to find any. Not in newvegasnexus.com too.
So as a last resort I want to ask the community here to confirm if they're any mods of this kind available or not. If they're available I would really appreciate it if you post the link in here!
I'm not saying that the graphic in this game is bad. Just that I think there should be more. Especially since the vanilla graphic only have 'fake shadows' on the environment, I hope there's a mod that can enhance the visuals a bit more better.
It's amazing though, that it took me a while to realize that the game doesn't actually have a dynamic shadow - where the shadow is 'real'.
There are mods out there that improve textures and remove the brownish "haze" that the world is colored by to make it more realistic (like blue skies). I'm not sure that is what you are looking for though.