REQUIREMENTS:
Reshade 5.2.1 (Download)

INSTALLATION PROCESS :
1)Download Reshade 5.2.1 from the official Website
2)Extract RealistiX V2.zip
3)Copy RealistiX Expanded and Enhanced.ini to your GTA V Directory
4)Install Reshade 5.2.1 by following the on-screen steps
5)select the given .ini file during the installation process of Reshade 5.2.1 to download all the necessary files
6)Launch GTA V and follow the ingame Tutorial to Complete the Installation.

NOTE: Keep the In-game Brightness between 50% to 80% for the best visual experience

Link to the Video Tutorial: https://www.youtube.com/watch?v=NClUIKlBGEA