Not sure if this is anything that can be addressed in a scenario, but the opacity of some of the fog effects in doors is rather extreme. It could be somewhat interesting if the AI had the same detection restrictions, however the games 'limited' FPS mechanics and tendency for delayed spawn-in combined with pea soup... well, it puts the "E" in PvE is a more literal sense.

edit: for reference this is the hallway in the abandoned bunker outside the room with the two switches and alien container that blows up.
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3401909969