Interstellar may have had a pretty sizable budget of $165 million, but this didn't stop director Christopher Nolan trying to save money where possible.
The production team had to grow a corn field especially for the scenes on Matthew McConaughey's character's farm, and after filming was complete sold off a "pretty good crop".
Explaining how he sought advice from Man of Steel director Zack Snyder on cinematic cornfields, Nolan told The Hollywood Reporter: "Luckily, Zack had grown a bunch of corn, so I said, 'How much can you really grow practically?'
"And they had done a couple hundred acres [for Man of Steel], so we looked into it; we found that where we wanted to build our farmhouse really close to the mountains [outside] Calgary. In the end, we got a pretty good crop, and we actually made money on this."