Director Peter Weir says he gets some of his best material just by letting his cast and crew improvise.

The Australian director of hits such as "Dead Poets Society," "Witness," "The Year of Living Dangerously" "Gallipoli" and the recently released "Green Card" is known for making sure crew members and actors who contribute to his films get the credit for it."It doesn't bother me who gets the credit as long as it helps the finished movie," Weir said.

In "Dead Poets Society," he used a few lines of poetry written on the spot by actor Robin Williams' stand-in for a crucial scene.

On Weir's newest film, "Green Card" starring Gerard Depardieu and Andie MacDowell, assistant cameraman Eric Swanek came up with the idea of shooting through a door's peephole to show one character's distorted view of another.