Oliver Stone: '"Snowden' Was One of the Hardest Things I've Done" | Director Oscar Roundtable

"It required so much research. It's research that kills you."

"To talk about Snowden, it took two and half years. It was one of the hardest things I've done because it required so much research. It's research that kills you. The information is so complicated," Oliver Stone told The Hollywood Reporter during the Director Oscar Roundtable. "I'm not a computer man. Just to go through this — layers and layers — and understand all these programs that the National Security Agency have come up with to snoop on people. Data mining at the highest level, all over the world, not just America, the whole world."

The triple Oscar winner (best director for Born on the Fourth of July and Platoon, and best writing for Midnight Express) admitted there are times when he has fallen out of love with film. "It's a long road. You go through lot of defeat. There's a lot of setbacks for everybody. We have some successes here and there, but it always seems like there's more failures than successes."

"When [Stanley] Kubrick said that famous line, 'It takes years to make a film and two hours to write about it,' he was really venting his frustration at people who can sit there and think they see it all in the two hours," Stone said.

More roundtables featuring actresses, actors, screenwriters, songwriters, documentarians, composers and producers will continue throughout February in print and online. Tune in to new episodes of Close Up With 'The Hollywood Reporter' starting Jan. 15 on Sundance TV, and look for clips at THR.com/topic/roundtables with full episodes on THR.com after broadcast.