This art from "Mickey's Good Deed" (1932) includes the animated snow, but very chilly Mickey and Pluto have been digitally removed.
Disney artists were making quantum leaps in this period, ramping up to produce SNOW WHITE in 1937. When you think this B/G is a mere four years after STEAMBOAT WILLIE (with its sparse, primitive B/G art) the artistic growth is obvious. And while not yet in Disney's full bloom, this B/G is nonetheless stylish and evocative.
Hot Cocoa, anyone?