This my Own Tutorial of how to install the preset of sweet FX I thank the creator of sweet fx and teh creator of thios preset for making this mod.
https://www.youtube.com/watch?v=I3fmhuj2ZYQ


HOW TO INSTALL Click "Download Preset" and download the link provided.
https://sfx.thelazy.net/games/preset/6205/
http://www.mediafire.com/file/b4kw1iuivj32k2m/Mafia+3+Reshade+4.0+by+Nyclix.zip

Use Winrar or a similar program to open the downloaded file. Place everything inside of it into your Mafia 3 directory.
Example: C:\Program Files (x86)\Steam\Steam Apps\ Common \ Mafia 3 An easy way to find your install directory is to open steam, go to your games list, right click mafia 3, click properties, click the local files tab, click browse local files and you'll be taken to it. This is where you want to place everything from the download link.

Simply drag and drop the contents of the download and that's it! Once you open mafia 3 there should be a few lines of text in the top left hand corner if working correctly.

You can disable / re-enable the effects by pressing Scroll Lock.