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
Lightmap changes
The lightmap has been a little tweaked to my personal preference to be a little more vibrant and dark, but it's 100% sure that these changes will be optional in the final product.
Shaders
The mod does not work with most shaderpacks, but it does work with Complementary Reimagined.