Original post here:
http://gamerrage.blogspot.com/2017/04/i-made-bioshock-reshade.html
I'm not on nexus often so tweet to me here: @harharharris

About this preset:
Experience Bioshock in a completely new way. This preset adds moody, eerie lighting that has been carefully tweaked for a more darker, under-water-picturesque, 50s-noir-like soft look. I also am contending for the most uses of hyphens in a single sentence up there.

If it seems too dark to you, then please turn up your monitor's brightness or use the Windows color calibration tool + turn the brightness up a few notches. It's a visual treat, trust me.

Installation:
Download reshade from http://reshade.me/
Install in your Bioshock exe directory.
If it asks to download the standard set of shaders, select yes.
Place the config files in the folder.
Shift + F2 to view reshade settings where you can set up shortcuts to toggle the effects as you please.