This works fine but it has two big problems for me, the first being that the moon cannot be replaced with an image file, the current featureless dot moon isn't enough for my game where the player will be looking up at the night sky a lot. GDQuest's sky shader has this feature but overall it isn't as good as this one.

This also desperately needs an "overall brightness/contrast/saturation" slider similar to the affects of the WorldEnvironment node's Adjustment sliders, but in this case only affecting the sky. Currently I have make my game environment 3x as bright (with the brightness adjustment) to have the sky be the intended brightness.

Overall this is good and works well, probably enough for most projects, but currently it isn't enough for mine and I wish it had those features above. If you update this addon I will update my review as well.

If I have missed anything that would fix my problems please let me know.