Visuals were mostly excellent, as expected. The only thing that I would have preferred would have been more realistic depiction of the stars on the background sky on space shots, but that's just my preference on the side of realism in these things. Although I have to say I would have preferred to see recognizeable constellations instead of randomly generated starfield backgrounds.
The starfield was actually created in a very similar way you do skyboxes in FreeSpace; it's a single high resolution starfield mapped cubically onto a sphere object. We didn't anticipate that someone would actually look for proper constellations, but I should have know you would

In our defence we did try to keep things somewhat real where we could. Rule of cool obviously was the name of the game, but there's at least some effort put into making things seem plausible.
I hope you noticed the Orion nuclear drive on the GWB. Early on there even was a scene showing it firing, but it was dropped since explaining it to the audience would have been too difficult.