I'm having an issue with dimension mods (Undergarden and Abyss)

[Vic2Point0]

Whenever I enter the Undergarden dimension, it's just blurry and black and white. I can see trees and such that are struggling to render but it never happens. The Abyss loads up a lot better but I still get just a plain (and very bright) white sky. I'm not having any similar issues in the Overworld. And as far as I can tell, the Nether and a place called the Bumblezone (from another mod) load up perfectly fine. Any ideas?

[Beethoven92]

Are you using shaders?

[Vic2Point0]

Yes. And when I turn them off, the Undergarden renders better (it's actually playable) but I haven't seen the sky yet because it looks like I'm in a large cave.  The sky in the Abyss becomes a dark green but with no clouds, stars or anything.