: There are a number of local light sources placed throughout Halo 2's campaign
: that cast shadows (including self-shadowing). The lights in the Arby
: hallways are a good example, but there's also flickering light at the
: start of Outskirts, or the streetlights in downtown Metropolis right
: before the scarab shows up.

Or are you just incredibly observant?

I mean, I'm impressed :-)