From American Cinematographer, Best Shot Films: 1894-1949 by George Turner (March 1999)
Putting the story on film was not simple. To show a village at twilight, the filmmakers contrasted the soft exterior lighting with lights coming from inside the houses. The sets of the city and an amusement park were built in a vastly over-sized scale so that the audience would see them through the eyes of the awed farm couple. Forced perspectives were built in to create greater depth, with midgets as extras in the back-ground areas.
[Sunrise (1927) had two directors of photography, Charles Rosher, ASC and Karl Struss, ASC... both of which share the first Academy Award for Best Cinematography.]