Day and night cycle.

The lighting changes via scripts. This means a mod is needed that will specify in some advmap-startup.lua file the execution of our script, which is subordinate to it, to change the time of day.
However, this will only work on maps that specify MapScript.lua (otherwise, the advmap-startup.lua files themselves will not run), which means it won't work on generated maps. Or, a map handler is needed that adds an empty MapScript to them.

In general, there is no such mod (yet), correct me if I'm wrong.