Innovation comes spontaneously. I don't know if I've done anything new. If I have, it's just because I had begun to feel for some time that I couldn't stand certain films, certain modes, certain ways of telling a story, certain tricks of plot development, all of it predictable and useless.
When I'm sure I have a story, I call my collaborators and we begin to discuss it. And we conduct studies of certain subjects to make sure of our terrain. Then, finally, in the last month or two, I write the story.
Another reason for switching to color is world television. In a few years, it will all be in color, and you can't compete against that with black-and-white films.
The moment always comes when, having collected one's ideas, certain images, an intuition of a certain kind of development- whether psychological or material- one must pass on to the actual realization.