Wow this is amazing. The anatomy is actually GREAT. IT look really natural and especially on the hand. I was struggling to sculpt the hands xD
You ever heard of the keyshot software? If not, you should check it out. It is great rendering software that is very easy to use and give you more realistic lighting and material(texture). :)
I could see that you will be amazing at zbrush very soon once you use zbrush for long time!