Out of curiosity... are you on a Mac? For the longest time, until today, glow maps would show up when viewing ships under the "Tech Specs" room, but in game, they weren't visible, or barely there. I've been away from FS2 for a while, and just installed WC Saga the other day, and noticed the same problem. Today, I accidentally fiddled with the brightness controls, and noticed that the interface didn't go back to the right color. Well, that didn't matter, because when I was in game, I could see the glow maps! Everything was a blue tint instead of the normal yellow though, but everything looked gorgeous.