Great job on the shaders. A perfect blend of performance and looks. I love that nice 'warm' feel you get with them, and with volumetric lights, it really is a looker!
One question though, is there some option to make the DoF effect have a slight ease in-out period? Right now it reacts instantaneously with the focus changes, which is mostly ok. Until you start mining, where the particles get picked up by the effect and cause a "flickering" of the screen as the camera adjusts focus.
Hm, depth of field isn't really usable for actually playing the game I think. But have to take a look at it anways, so will see.
The detection might be abit off, will take a look at this. Nether shaders are a bit cut down, so no reflections.