That's art applied at the factory. PV-1s were built at the Vega plant at El Segundo, and artists from Disney and Warner Brothers would come by and apply cartoons to the airframes during construction. Some featured well-known characters, others were one-off originals. This one features a palm tree and of course, the plane was set to the Aleutians. There are other cases with snowy scenes based in the Marshalls. 🙂 Here's the art Boris Ilchenko worked up, plus a shot of the plane with an unknown crew (not the Patteson crew).