Originally from Malaysia, Ian Jun Wei Chiew studied here in the U.S. at Academy of Art University in San Francisco, and is currently working at Microsoft Turn 10 Studios.
Chiew is adept at representing the the effects of both light and atmosphere, and I particularly enjoy those pieces in which he uses both together.
His website features a portfolio of his work in digital painting, CGI modeling and traditional painting and sketching media. He also has a blog, though he has recently moved his updates to his deviantART gallery.
[Via Concept Art World]