What is the use of a skybox?

[Kenney]

What is the use of textures as a skybox? At night the skybox would be way too bright, having two skyboxes wouldn't allow for a smooth day/night transition and the textures can't be transparent (to only show clouds). So what is the use?

[twoelk]

Visit OldCoders Moontest server to gaze at the spectacular but static sky of endless night

that and changing the texture for the moon and the sun may be the most you can achieve at the moment, though both cannot yet be combined at the same time iirc.

[paramat]

https://forum.minetest.net/viewtopic.php?f=11&t=6329
In this mod i decided the moon always has one side facing the sun, the mod is located on the bright side.
The custom skybox is usually used with 'player:override_day_night_ratio()' (see my code) to fix time of day and therefore light at one value. I guess a few skyboxes could be made and stepped through as a day/night transition.
Because both are per-player they can be changed according to a player's position in the world, good for stacked realms.