Looking at the winner photo, I see what Cheryl was saying about the photo session. Last year in Glasgow, we gave a lot of thought to the post-award photo session, taking care to have a properly lit photo area. We didn't do the movement of the nominees to the photo area as well as I wanted -- I came up with a method in hindsight that I think would have worked, but never mind -- but we still had a good photo shoot. LA did what just about every other Worldcon has done, as far as I can tell: make it up on the spot and ask the winners to come on stage, where the lighting conditions are wrong.
L.A. even had a reasonable option here, I thought: Take the nominees next door to the Arena Lobby (Spaceport Lounge), where they could have set up a proper photo shoot area. But I don't really fault L.A.con IV that much; it's not like they did any worse than almost every other Worldcon.
I wonder why it is that Interaction (er, well, Cheryl and I) thought through things like the Former Worldcon Chairs Photo and the Hugo Winners Photo shoots, while everyone else leaves them up to chance.