Features added/changed:

+ Added experimental screen space shadows for Distant Horizons chunks. They work only on versions above 1.21.1 and fall back to regular shadows on older versions.
+ Re-added an option to enable volumetric light rays inside 3D clouds.

Features fixed:

Fixed flickering shadows with Distant Horizons
Fixed VL not working with Distant Horizons. Still needs to be improved tho
Fixed incorrect volumetric clouds depth rejection
Fixed Milky Way not being rendered
Fixed some compilation errors