Creating the complex reality of a world shared by humans and a displaced alien population has its challenges. The integration of Nalardian technology in the post WWII world that we live in has been a hot topic among the artists working on post-production. Here follows an excerpt from a recent email thread.
(3D Artist): On one hand the "potential" which is key to much of Nalardian technology seems to be quite machine-oriented. The laws of mechanics and engineering will be the same for humans and Nalardians, so design will tend to be the same as well. In this way, Nalardian technology will look similar to human technology, more advanced, but similar. On the other hand they have developed on a different planet (probably for at least several thousand years) so their culture must have generated some design styles very different from our own. Even if the Nalardians and human design styles are drawn together by a common understanding of the physical sciences, a culture of thousands of years won't lose distinctive design practices in just sixty years of coexistance with humans. I think the Joint Command Tower sketch demonstrates this, it looks rather alien in design. Overhanging, unsupported, circular, and monolithic. This could be a leftover piece of the mother ship the Nalardians arrived on right? It would therefore display undiluted Nalardian design (neglecting the post-landing additions such as Benny's Fuel and Repair, et all.
(Writer Director): So far my philosophy on this has been pretty simple. The Nalardians introduced us to their technology, and we integrated it into ours, meaning the technology retains a human man-made flavor, with alien abilities, such as ships hovering, not needing to have massive fuel tanks, stuff like that. However! The one trait that DOES get passed over from the Nalardians is that since the Nalardians interface with their technology using an element of "Potential"; the more complex the machine, the more "lifelike" it is, and the more moving parts it has. Nalardians see technology as extensions of themselves, so most of the technology echoes that in some way. The floating buildings fit that perfectly. They're basically just awesomely tweaked-out modern buildings with anti-gravity whatevers in the middle. And you are TOTALLY right about the tower being the only real piece of pure Nalardian technology we see. I think I may have to come up with a different concept with that in mind. But yeah there is no overall universal style—like the Nacromongers who were HIGHLY gothic in "The Chronicles of Riddick"—because basically just looking around real life, there isn't any single unifying theme. Usually it's function over form, and the only time form really matters is when the whatsit belongs to the upper class where the money is.
(Producer): Would you say that the Arizona exosuit is an example of Nalardian style? It certainly is distinctive.
: I think the Arizona exosuit is a good example of the union of the two styles, really. Looking at the robot, the only thing there that's not technology already used today is the crazy anti-gravity wing array thing in the back. Everything else (the cockpit windows, the fins, the blades, the hydraulics, the wheels) are all materials and stuff we already have, we just didn't know HOW to arrange them into a giant sweet-fighting robot, and that, primarily, is what the Nalardians helped with.