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As Nolan's debut feature, it was designed to be as inexpensive as possible to make. Scenes were heavily rehearsed so that just one or two takes were needed to economise on 16mm film stock, the production's greatest expense, and for which Nolan was paying from his salary. Unable to afford expensive professional lighting equipment, Nolan mostly used available light. Along with writing, directing, and photographing the film, Nolan also helped in editing and production.