High-Dynamic Range Rendering Technology.
That's the technical term for the new feature of Half-Life 2, which will be introduced in the add-on that's coming
soon.
The demonstration is a movie, and it's a giant 166 meg download, so you might want to shut down all your illicit P2P
downloading for a bit. We guarantee the movie will be better than 99% of what's on TV tonight.
Engadget
TUAW