It looks like you're new here. If you want to get involved, click one of these buttons!
X-tended 2.0 for Terran Conflict makes the game amazing. And look amazing as well. Best graphics I've personally seen in a game. Lots of new features and stuff too. I waited for over a year for 2.0 to come out...but I know it was in development for longer than that. Its biggest mod for X3 I've ever seen though.
Screenshots and details in the link.