An anecdote from his work on A Perfect World:
Costner was a big star who had agreed to make an art film while Eastwood was determined to make a Clint Movie, and they were at cross-purposes. Finally, Eastwood called Costner from his trailer for a scene, and Costner told him to wait — that he wasn’t ready.
“Find his extra,” Eastwood said, “and put a shirt on him.”
He wound up shooting the scene with the extra — with the extra walking through a field, and the camera so close to him he became a blur. Then Costner emerged from his trailer and announced that he was ready to work. “Never mind,” Eastwood said, “we’re moving on.”
Mark Larson 