Swanberg doubled as cameraman for parts of the film , as West trusted his background as a filmmaker to shoot the scenes without supervision .
The parts were written specifically for the actors , as Roth gave West full creative control .
Swanberg doubled as cameraman for parts of the film , as West trusted West 's background as a filmmaker to shoot the scenes without supervision .
The parts were written specifically for the actors , as Roth gave West full creative control .