Patron's have a tutorial available in the patreon blog. Its a walk through of how i do my grayscale images. The process is the same as all my other shading, it is just setup a little differently.

https://www.patreon.com/posts/2838541
For the moment, tutorials are Patron's only as they are helping to paying for the time it takes to put them together. (As well as the Progress videos and whatnot.)

I hope to put together a walk through bundle with a bunch of tutorials in my store shortly but it might be a little bit before that happens just because they do take quite a while to do. But i really want to do some voice over video tutorials. If you want to see more tutorials, vote on which ones i do, ask questions/get clarification of my techniques, one-on-one lessons, etc! Patrons get to be directly involved in all this stuff.
https://www.patreon.com/posts/2838541