The Darkness [BLES00058]

Just reduce the value to your desired one in the text section of your patch.yml. for me 0.3 works just fine.

Code:

Lower Exposure:
    Games:
      "The Darkness":
        BLUS30035: [ 01.03 ]
    Author: illusion, Aphelion
    Notes:
    Patch Version: 1.0
    Patch:
      - [ bef32, 0x10AC2F0, 0.6 ] <-- change your value here (for blus)

I set vblank frequency to 120 (the internal resolution setting does not seem to change anything.), so the game runs mostly at 60 fps (RTX 3090, Ryzen 5900X). I have finished the game on RPCS3 Version: 0.0.15 Alpha (THE DARKNESS [BLES00058]), patch 1.03).

Tried out the new lower exposure patch, and whilst it definitely improves the visuals, there is still some graphical glitches going on:

   

If you can see the brown lines everywhere. That I've not able to get rid of. Tried doing as you said to change the vblank value and tried putting in different values in the patch file, but it has no effect on it. A value between 2 and 4 looked best on my screen.

This games so close to being visually right. Just needs some TLC by the devs to iron out the bugs.