Skin Directionality + Likeness

Hi All. Module 4 for creature design dealt with skin directionality and wrinkles. I decided to do a small test first just to get some practice in before I deal with it on my bat creature. Here's the sculpt I came up with. A few hours. Based on Mr. Clint Eastwood. I might extend this in the future and texture/render it. Currently the detail work only exists for the front view. BPR view from zbrush below.