This is most excellent! There's just something special about playing hell themed maps in a snowstorm with no performance loss. The lighting and sound effects really add to the whole package. The sounds are a bit loud for my taste, but the sound effect quality is immersive and pleasant.
After using it for a few days I thought it would be cool to add
green and red rain to match different environments.
I will say that this mod does not play nice with LZDoom's pseudo-rng option, precipitation falls in a single-file line above the player, but I think that's just the nature of that option.
Great work, I'm surprised at how well it fits almost any map!