Finally got a chance to go thru this tutorial by Greg Rutkowski (which I purchased ages ago on gum road). Tried to simulate his style using his brushes without doing an exact 1 to 1 of his painting (I drew stuff differently intentionally). Mine isn't nearly as good as his, its too stiff and now that I look at it way overboard with the texture quality of the brush strokes. But anyway, was a good learning experience and I'm sure I'll get better with some more practice. This is all done in photoshop, from scratch with Greg's Brush pack.
Side note: I've been sorta all over the place lately with my art... but I think I'm going to try to commit a little bit of time every day to drawing and painting (cause drawing especially I need to improve on) and see if I can get back into some of my 3d projects again like Ryan Gosling likeness. I recently moved and started a new job so its been pretty challenging lately. Anyway here it is!
Greg Rutkowski Tutorial:
Gregs Final result for reference: (not mine)