Roland
Moderator
Dude. Yes it is. Officially. No modding required. The game remembers your setting. You literally just need to change brightness to your own personal preference one time and it is set. You don't have to make everyone else play with darker nights. I changed mine to 15% about 2 months ago and haven't changed it since. I also disagree that the default setting is the same as people cheesing the night by turning gamma up to 200% as was possible in the past. Artistically, the night looks really nice at default brightness. You and I prefer the challenge of darkness over visuals and thankfully it is simplicity itself to change brightness to 15%. You can even do it while in game if you want to see if for you 12% is better.This is not currently the case.
You sound about 3% more hardcore than I am in this regard....