20 Things You Didn't Know About Shutter Island

1. All Of The "Daytime" Scenes In Cawley's Office Were Shot At Night

Though Scorsese burned through much of the film's $80 million budget utilising complex post-production techniques to achieved his desired look, sometimes the simplest, most old-school solutions are the best.

Case in point, we have the scenes where Teddy and Chuck visit Cawley's office, which quite clearly appear to take place during the daytime.

Except, they were actually filmed at night, and so in order to give the impression of day, Scorsese had high-intensity lights shone through the office's stained glass windows.

Despite how obvious night-for-day photography tends to be, you'd never have guessed it in this instance.