If you don't know who Berdu is, I recommend googling him right now.
He does incredible things with in-game photography -- most recently with Star Wars Battlefront -- but for the last year he's been taking photographs with Grand Theft Auto. This is the end result and it's amazing.
Berdu does use mods in his photography but, incredibly, he does not use photoshop. At all.
These are just a few of the pics posted in this massive collection. These are my favourites, but there are so many good ones to check out.
You can check out the full res images on Berdu's Flickr account.