So it would look rather stupid to have a big plane white rectangle in the middle of the shirt. (footballkitnews.com)
In each resulting photograph, the movie is seen only as a glowing white rectangle that appears suspended in space, illuminating the mysterious effects of the passage of time. (anti-utopias.com)
(The box looks tiny here, but it's actually a book shaped white rectangle with no border, then a small box in the middle. (creativindie.com)