There are three presentations on Alan Wake as well. XD
Looks like I was completely off on the Impostor tech. Voxels eh... Definitely go through the Reach LOD presentation on full screen so you don't miss the transition frames.
Too bad there is no audio for the Alan Wake slides. Not a lot of detail in the slides alone. Big fan of that game, and it had one of the more radical choices in terms of visual tech/design this gen (at least as far as third person games go).