I put it up, see how it works for the characters, see what it does with their clothes and their feelings, and then redo it, maybe. I want to build everything together. It's all pre-production. When I'm reading and when I'm writing, I don't even visualize the faces of the actors. I don't trust myself while I'm writing to know what I want at the end.
Life changes completely.
Even after the film is cast, I change things a lot. I adapt to the real actor, to the real person. Sometimes I put many things that belong to the person in the character. It's the only way. The ideal cast doesn't exist, especially in Spain.