David Luong is an artist who, aside from helping out on a number of big-budget Hollywood movies, has also been involved with several Blizzard titles, including Diablo III, World of Warcraft and StarCraft II.
While he's done visual FX work as a compositor on some of Blizzard's best cinematic trailers, he also does matte paintings, and you can see examples of both below.
Note that, obviously, the trailers are the work of many artists, not just David.
If you like what you see, be sure to check out David's personal site here.
To see the larger pics in all their glory (or so you can save them as wallpaper), right-click on them below and select "open in new tab".