Old Hollywood

Brigitte Helm in Metropolis (1927, dir. Fritz Lang) On the creation of Robot Maria: "The concentric rings of light that surround her and move from top to bottom were in fact a little ball of silver rapidly swung in a circle and filmed on a background of black velvet. We superimposed those shots, in the lab, over the shot of the robot in a sitting position that we had filmed previously." -Fritz Lang