So... those shaders look amazing, especially the rain effects, they're gorgeous. However, there's a little bug. I tried using ChromaHills, since it's the recommended back but... some of the blocks don't seem to have POM enabled, which looks weird. Like... cobblestone looks flat but mossy cobblestone looks all bumpy, same goes for grass and dirt as well as other blocks.
I also noticed a weird issue with the auto-exposure. I had to disable it because each time I move the camera around, the exposure seems to flicker.