When the film stock was processed, several techniques were applied to alter the look of the footage and increase the ‘grubbiness’ of the image. Under the supervision of director David Fincher and director of photography Jeff Cronenweth, the contrast was stretched, the print was underexposed, re-silvering was used to increase density, and high-contrast print stocks were stepped on the print to create a layer of ‘dirt’, which Fincher likens to a “dirty patina.”