Solas Shader

Features added/changed:

+ Added generated nebula to the night sky
+ Reworked the atmosphere once again for more vibrant colors, smoother gradients and better colors
+ Improved lighting on volumetric clouds
+ Added a config menu for creative light block color
+ Fixed water fog having different intensity underwater and outside
+ Added iPBR handling for glow item frame. Items placed in it will not glow brightly
+ Tweaked night colors

Features fixed:

+ Fixed Voxy water disappearing in very far LODs
+ Fixed incorrect GGX specular highlights model that has been present since the very first version of Solas
+ Fixed rain puddles not working
+ Fixed entities turning dark when activating POM

Features added/changed:

+ Added screen space ambient occlusion and shadows. Both work on normal terrain, Distant Horizons and Voxy LODs. Screen space shadows also extend the regular shadows even without Voxy or DH.
+ Reworked planar clouds to look more like real life cirrus clouds
+ Improved lighting on the ender protoplanetary disk
+ Improved blending between different sky effects
+ Improved red aurorae. Now they are way more saturated
+ Made cloud shadows a bit softer

Features fixed:

+ Fixed shader failing to load on versions of Iris below 1.19.2
+ Fixed some compatibility errors on 1.12.2
+ Fixed volumetric clouds clipping through Voxy LODS
+ Fixed water artifacts with Voxy
+ Fixed water disappearing at 2 chunks render distance
+ Fixed end flashes not working correctly with Voxy
+ Fixed exponential fog noise taking very weird shapes
+ Fixed several compilation errors when toggling different options

Features removed:

- 512 shadowmap resolution. It makes no sense, really 

Features added/changed:

+ Added low Earth orbit. Flying to Y=100000 (by default, controlled by the Karman Line slider) will slowly transform the atmosphere into a planet below the player
+ Added pixelated shadows option
+ Added Overworld atmosphere options. There will be more of them soon
+ Improved Ender Black Hole and Protoplanetary Disk
+ Improved subsurface scattering
+ Improved LPV fog and increased its contrast and intensity
+ Adjusted planar clouds lighting

Features fixed:

+ Fixed shader failing to compile when setting it to Low profile
+ Fixed gbuffers_hand error on OptiFine
+ Fixed exponential fog failing to reach far LODs with Voxy and Distant Horizons
+ Fixed realtime shadows not working on OptiFine
+ Fixed crepuscular rays being barely visible

Features added/changed:

+ Added full support for Voxy mod. In the next Solas update I'll probably add screen space shadows to Voxy and DH LODs.
+ Remade and greatly improved volumetric clouds for better, more realistic lighting and shapes. Many things are still subject to change, but I'm mostly happy with them.
+ Completely reworked the Aurora Borealis. It is now much more realistic, dynamic and beautiful. And it's just the beginning so stay tuned!
+ Added generated emission to handheld and dropped items
+ Added shooting stars based on @SpacEagle17's implementation
+ Improved planar clouds lighting and blending
+ Added support for Colorwheel mod
+ Added rotating noise to the accretion disk of the Ender Black hole
+ Added subtle warping to clouds closer to the Ender Black hole to make them look like they're being pulled in
+ Added options to toggle specular highlights and textured fire/lava.
+ Added new materials to integrated PBR

Features fixed:

+ Fixed some options missing their translations
+ Fixed multiple compilation errors
+ Fixed shader not working with Distant Horizons
+ Fixed nether portals turning green
+ Fixed Ender Nebula not changing at all when the player travels large distances
+ Fixed moon phases being mirrorred horizontally

Features added/changed:

+ Reworked dynamic clouds weather. It should be much smoother and even more random now
+ Improved Aurora Borealis
+ Added color settings for copper torches & lanterns
+ Tweaked the behaviour of volumetric light rays in closed spaces

Features fixed:

+ Fixed some compilation errors when toggling different options
+ Fixed Aurora not lighting up clouds in purple color
+ Fixed water with Distant Horizons
+ Fixed harsh transitions in dynamic cloud weather code
+ Fixed copper emitters not lighting up objects when they're held
+ Fixed volumetric clouds being nearly trasparent when it's raining
+ Fixed incorrect water fog lighting when holding an emissive item

Features removed:

+ Held emissive objects no longer affect water fog lighting. I'll probably rewrite this code in future releases to adress the issues it had