I saw this large print in the V&A recently, and was fascinated to learn how it was produced.
This image is actually a ‘combination print’ of six different negatives, and the subjects are actors on a stage built especially for the photograph. Different exposures were taken and carefully (but not entirely seamlessly) stitched together to form something not unlike a modern high dynamic range image. The result is more like a painting than a photograph.
Have a closer look at ‘When the Day’s Work is Done’ on googleartproject.com.