@keosar - Ask and you shall receive I have created a teaser image of sorts to show how the initial pattern was created. I will be working on a more in depth tutorial, very busy right now with work so I hope you all understand it may take a bit. I hope this helps for now.
@josh_lynch Hey man... Thx for sharing some much info. I'm trying to recreate this for a more random stone generator and am having a heck of a time pulling a good edge detect. Am I missing something? Did you get a chance to finish this walkthrough or is there a portion of one of your other gumroad tuts that explain this bit? Cheers!