Solas Shader

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