In which file can I tweak some visuals settings like ambient occlusion?

[DeakyStJohn]

I don't mean the graphics settings file itself, where you can only choose low-medium-high-ultra etc. I can do that in the game menu.

 

What I'd like to do is to tweak the actual visual parameters like for example increasing ambient occlusion strenght. By experimenting with reshade MXAO shader Ive found that the non ray traced occlusion is really weak (and probably intentionally for "enhancing" the ray tracing version which had a pretty weak lighting improvement, until path tracing patch came out 2 years later) and that the game visuals really benefits from an increased ambient occlusion. But as some of you might know reshade shaders overlap everything including menus and volumétrics like fog, sunrays or a volumetric light coming from a pole. So yeah it would be a lot better to increase the AO strenght with ingame files that way there wouldnt be any overlap of any kind that would ruin the scene.