In the early '90s, I was hired to write educational dramas about HIV and AIDS in the shantytowns. I did that for two and a half years, and then I was hired on other films. When 'Tsotsi' presented itself, I thought, 'This is not a world I grew up in, but I've spent a great deal of time writing about it and researching it in my past.'

Athol Fugard became famous as a playwright, so although 'Tsotsi' the book was written in the '60s, it was only published in the '80s. It was then optioned pretty much every year by producers. I think the problem was that holding onto its period setting made it very hard to get finance.

Most big popcorn movies are 'bad guy does something to good guy, good guy gets revenge on bad guy, sets the world right, and moves on.' And 'Ender's Game' is just not that simple, so it's an exciting challenge. It's a little terrifying, and let's see how audiences respond.

The first prize for any production is, if you can find a location that means you don't have to build sets, that will serve, and is not excessively expensive to hire, then it can save you a lot of money.