We do not know the name of the artist who designed this beautiful poster showing the famous "drop scene" on the Wanganui River, but one possibility is John Holmwood, based on suggested attributions for similar posters. The term "drop scene" is more commonly used in the world of stage settings and backdrops, and indeed this scene would make a splendid backdrop for any action.

New Zealand Railways. Publicity Branch: Wanganui River; scenic trip by train & launch. New Zealand / N.Z. Railways Studios. Issued by the N.Z. Railways Publicity Branch [1930s]