DaC-Sniper at DaC pointed out this test art with a note (an art test, not concept art):This was done by me for Bethesda Softworks, as a kind of "art test"... they sent me an illustration of this character, and I had to design him in 3d. Hope you guys like it!Checking it up, DeviantArt's ConejoBlanco 's real name is Jonah Lobe. And what does Ashley Cheng say about Johan Lobe in his blog (my highlight)?
Character Artists - Christiane Meister, Jonah Lobe, Gary Noonan. Christiane made the new armor and weapons. Jonah created the new Aeylid creatures you fight, and Gary get their animations working.So looks legit, as an art test. But note that he doesn't claim it's for Fallout 3 anywhere, but with the title "raider" and the look of it, that looks very likely.
Link: Johan Lobe Raiders art test
EDIT: Bethesda Dev MrSmileyFaceDude notes:When an artist applies for a job at Bethesda, they are often given a 2D drawing and asked to create a textured, 3D model, so they can show how well they can take concept art and turn it into 3D art. That's the kind of "art test" Jonah's talking about. It wasn't a proof of concept or anything like that.