Nathan Crowley: For me, it's very important to give reason to everything, to have a good foundation for all the technology. I don't want to do anything that's silly and can't happen, so it has to be based on our rules. We know we have to fly around bouncing light off the ground to obtain levitation. But how are we going to do it? We kind of figured out that we're in the 1880s, we're in the start of the Industrial Revolution, so why don't we say we're in the times of tall ships? We're in that changing period when the book was written. So while we don't want to go down the road of Jules Verne, where do we go?
Nathan: "I still send messages to Andrew in Martian"We decided there's no fly-by-wire. There's no electricity. We're in a world where people messenger things, send each other telegrams. Say that if you are flying around you are basically flying a tall ship. That command structure is based on runners or bell systems. You have a man who tells the men to pull the wings to 10 degrees. We came up with all this technology. So again, we're on Mars – navigation is different, navigation is done by two moons. So the equipment you need to run to navigate changes. We actually wrote a rulebook. It was huge. We made a 90-page rulebook. I mean, we had to come up with an alphabet to translate. I still send messages to Andrew in Martian [laughs]. And we had all the extras coordinate, we said, "you're the lightmaster, you're in charge of navigating where the sun is as it bounces off the solar cell on the wing. But you have to also give commands to the 20 crewmembers" – or, as we called them, wingmen. Even though cinematically people might not understand that, it's there.