Hey thanks for the quick reply!
Funny enough I actually just went through his a lot of his videos on youtube. The math in this is definitely hard to grasp via the code. I think I'll have to watch this video more closely on YouTube and see if he offers decent explanations. I only watched through his creating the floor and ceiling. One thing I've found difficult about getting into the game development is that a lot of tutorials and online videos skim over what a lot of the things do. A lot of hand waving if you will.
I mentioned the Notch stuff since in Minicraft he seemed to create maps by what resembles a "render clouds" filter in Photoshop. Pretty neat!