Nicer Skies
Nebulas
This mod renders a seed/server-dependent skybox that is 100% generated in runtime with cool shader-like nebulas.
Star rendering
Stars will twinkle and be of slightly different colours
Configuring
Configuring the mod requires Mod Menu, otherwise it's stuck at the default settings seen below.
To access the screen, go to the mod list and press on the settings button on Nicer Skies.
Shaders
The mod does not work with most shaderpacks, but it does work with Complementary Reimagined.
Nebulas look really good even when no shader is running!
A subtle, customizable rainbow effect is added as base to the sky.
A nice coincidence
Complementary Reimagined's aurora borealis look amazing when combined with Nicer Skies' nebulas.
The configurability of the mod is quite high, and individual features are toggleable.