 For the scene in which Scarlett escapes the burning of the Atlanta  Depot, a horse was needed to play Woebegone, an old nag on the verge  of collapse. A suitable candidate was finally found, but weeks  later, when the horse was brought to the set, it had gained weight  and its ribs were no longer visible. There was no time to find a  replacement, so the makeup department painted dark shadows on its  ribs to give the appearance of malnourishment.