Kadaj15 is an outstanding artist at Renderosity. He often creates portraits that are very dramatic, but as is the case with his creation, Jack, he goes for a more realistic and mellow vibe. Even so, one can see hints of trouble in this portrait: his eyes are slightly red (hangover?) and the heavy jacket gives the impression that he might be a cruiser.
It's all in my imagination but drawn from a truly wonderful 3D portrait. Kadaj15 used DAZ for this image, rendered in iray. The lighting and skin textures are perfect. Jack is one of those creations where you don't for a minute question that this is a person with a story.
Please go to KJadaj15's Renderosity gallery if you can. He's got a ton of great work there. One of fav artists now.