Half Life 2: Lost Coast exclusive HDR preview
 

The interesting thing to note is that Lost Coast will perform rendering on X800-range cards, showing that you don't need Shader Model 3.0 to perform HDR operations

Exposure Control is demonstrated by turning Gordon to the right, facing the wall: with the sunny doorway out of our field of vision, the aperture widens and our eyes adjust to the dark, revealing extra detail on the floor and walls of the tunnel. Turn again to peer out the door, and you'll find yourself wincing involuntarily at the light, and wishing Gordon had brought his sunglasses.

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