I downloaded and installed Reshade (https://reshade.me/) for my GTA 5.

-What this file does
My intention is to bring out the settings to show a more realistic feel. These were tested on my Ryzen 5 2500U, 8GB ram, 4GB VRam PC. Resolution was tested in 1600-900 and running smoothly on HDU-L, with only slight lag when using HDU-M. It gives a more realistic feeling, and may even make the gameplay feel better when used on more advanced PCs. (With higher specs, though it's merely speculation)

-Why I made these
I did so because I didn't want to alter the game files in anyway. Bare in mind, I haven't tested these online, and I do not know if using these online is possible without ban. I plan to test it, though I find it to be risky and may re-consider.

-HDU-L
Low settings. What I plan to use for my current PC. Recommended for low GPU's

-HDU-M
Medium settings. What I plan on using when I get a more advanced PC. The more smoother option, with more effects and such. Recommended for PCs more advanced than mine.

If you have any questions, let me know in the comments.