Create one vertical 9:16 photoreal cinematic reference still of a white late-1950s Cadillac parked at a refined classic-car gathering beside a private airfield at early evening. The Cadillac has authentic period proportions, chrome trim, softly polished ivory paint, believable tires and natural suspension weight. Keep the Cadillac as the only sharp vehicle. Other classic cars and visitors are distant, soft background atmosphere. Camera: low three-quarter exterior, 35mm lens, blue-hour daylight mixed with subtle practical event lights. NEGATIVE: modern car, showroom, excessive mirror finish, visible badge text, crowd near camera, CGI, watermark.