A strange graphical error

[Armistead]

Originally Posted by larsonboram

No mods running, Night time in the campaign I havne't run mods XD

Try this, at night, hit control-n, this will reset the weather, which refreshes the env. files and see if it does anything.

I don't know that I've ever heard of this issue, where the game is totally normal, but night sky is blue like during the day, but I've seen corrupt files change colors of the game.

Again, since you have no mods, etc., I would try reinstalling the game, if it continues after that, least we know the file structures aren't an issue.