Characters remain stationary while the background changes in the UPA cartoon Unicorn in the Garden (released 1953). Psychiatrist I. Ego doesn’t move as he’s transported from his office into the home of an evil wife done in by her scheme to have her mild-mannered husband committed to an insane asylum.
The Oscar-winning short Gerald McBoing-Boing did the same sort of thing. It also used colour for mood. This cartoon does the same. The interior of the house is dominated by the psychopathic wife. It is dark. But toward the end of the cartoon, when the husband enters, the home suddenly become bright. Why? Because the wife is in a straight-jacket about to meet the fate she schemed to give her husband.
The meek guy suddenly smiles at the end. He’s rid of his abuser. And there’s another transition from indoors to outdoors.
Bill Hurtz directed the short with animation credited to Phil Monroe, Rudy Larriva and Tom McDonald.