DH 2.0.1 + Iris 1.6.11 + Shrimple Shaders 0.10 no blending

At this point I've tried everything, I'm on Quilt 1.20.1, and with or without Blendium the result is the same, zero blending (with shaders disabled Blendium does work perfectly though) Only things I've changed in the DH config are rendering distance to 32 and lighting to "old lighting". Also enabled the Distant Horizon setting in the Shrimple config. I'm also disabling shaders in the main menu and enabling them in-game, which does avoid the LOD rendering as day during the night, but it seems like the lighting is still the vanilla one. Any ideas?