Not sure if you guys have seen anything on this yet, but I thought it was a really cool use of old-school scratch-building (and multi-pass filmmaking) techniques. Really great to see someone using the old ways again. So many people build fantastic studio scale models of spacecraft...I just wish more would film them in this manner, or with proper chromakey!
C The Movie
If you check out their old Kickstarter page (link in top right corner of their website) you can see more behind-the-scenes footage.