Zbrush Relief

Long story short, I broke-down and started a zbrush piece. Have been doodling relief type stuff for a while and thought I would try doing a study. Here is the source ref and where I am currently @. Think it is going pretty well, focusing on keeping it clean and controlled. Still have a few loose spots to go, not sure if I am going to take this thru to texture or just stop after the sculpt.