 Matte paintings of the Austrian castle and German airport were based on real buildings; the Austrian castle was a small West German castle that was made to look larger. Rain was created by filming granulated Borax soap against black at high speed. It was only lightly double exposed into the shots so it would not resemble snow. The lightning was animated. The airport used was at San Francisco's Treasure Island, which already had appropriate art deco architecture. ILM added a control tower, Nazi banners, vintage automobiles and a sign stating "Berlin Flughafen". The establishing shot of the Hatayan city at dusk was created by filming silhouetted cutouts that were backlit and obscured by smoke. Matte paintings were used for the sky and to give the appearance of fill light in the shadows and rim light on the edges of the buildings.
