I've always wondered why everything in the game stays bright at night and just the sky darkens.

I have added a line of code to the time object, so the whole game gets dark at night and not just the sky. Since you can't make a screenshot that shows the changed gamma, somebody would have to review it, if it's ok.

I hereby license the file 0001-Added-SetGamma-to-the-time-object-s.patch under the CC-BY license