Installation

1. Download Reshade from https://reshade.me
2. Extract to a location
3. Install it into your RDR2 folder where the RDR2.exe is
4. Download Realistic Reshade and put the .ini into the same RDR2 folder
5. activate it ingame by pressing "Home" key and select
Realistic Reshade.ini 
6. Press "PageUP" key inside game to bring up the reshade menu if you have downloaded the optional version.