Awesome anatomy studies man. Like how you are going into different muscle groups . Your lines are improving a lot. I like the paintings. The color schemes are interesting, I especially like Touching the truth one. It has a god composition. The colors are working well together. I think the hands of the man could be worked on .
The zbrush sculpt has come out awesome. Great anatomy and proportions on it. Do moar sculpting!
Keep them coming man. good luck.