2. Skybox doesn't darken during rain, which looks really bad (even compared to the vanilla game where it at least works). How can the sun even shine through the clouds during a storm? It would be nice ...
Astral sorcery has it's own rendering pipeline, but it seems to be in conflict with the way optifine does things when shaders are involved (except for internal shaders). I suspect it's an optifine/AS ...