Rendering the Face and Capturing Likeness

I've been working at capturing the likeness of an actor (Michael Fassbender) and rendering the face with greater realism for the past five weeks. I've had a good amount of success with improving the rendering and my sculpting skills, however I haven't been able to capture the likeness to a degree I am happy with. It's so difficult! I resculpted the eyes at least twenty times and I compared reference photos to the forms in the sculpt and even though almost every thing matches up, it does not resemble Fassbender. I am fairly happy with the convincing quality of the latest renders though. I will likely keep adding renders to this post in the coming weeks. There were maybe three times as many test renders as you see here, I didn't post them all. I worked for at least 2 hours a day and at most up to 8 during the last five weeks.

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