(Optional Folder has a lite version incase you dont have a powerhouse of a computer)

You will need Vulkan version of RDR2 and Reshade ( This is reshade whh i needed https://reshade.me )
Drag and drop the "SplinterzVibrantVisal" File to your directory or custom preset folder and select it from the top of your reshade folder.

Video Guides:

1-
https://www.youtube.com/watch?v=qybp8GCyUAg

2-
https://www.youtube.com/watch?v=H9iZnaYtAxE&t=150s (This is might work for DX12 but also is a enhanced tutorial for all graphic api)