Installing new meshes, 4k textures and ENB will only get you halfway there. It is not just a matter of pushing the graphic sliders to the max: you usually have to dig enb config files and change settings 1 by 1. It is time consuming and tedious. Those types of screenshots are taken with graphics settings pushed to the max that usually render the game unplayable (<30fps on titan class gpus).
they gotta make it more accessible, even if it does make it unplayable lol. 10 years ago, digging through config files would have been fine, today i don't have that time.