There is a mod called "Amands's Graphics" for offline Tarkov that removes fog, removes the grey/brown overlay and improves lighting. Why can't the developers just copy this? It significantly improves the visual quality of the game. The fog isn't even hiding occlusion culling for performance.
Here are some screenshots:
Factory:
Labs:
Customs:
Interchange:
Lighthouse:
Reserve:
Woods:
Shoreline: