Night Sky Shaders
A Night SkyBox for Minecraft but without OptiFine
Using Minecraft's Vanilla Shaders implementation
Disclaimer : I'm not the creator of this resourcepack !!!
It was originally created by Selicre
And the original resourcepack was uploaded on this Reddit post
I just reposted it here and published an updated version of it so that you can use it more easily
Compatibility
For Minecraft 1.17 and after
Download
Go to the releases and download it for your version of Minecraft