retro diner themed exhibition booth backdrop, stage-like display, flat background panel, front-facing composition, shallow depth, not a full room, pastel mint and cream color palette, soft desaturated pink accents, checkerboard floor pattern (white and mint), large centered neon sign on a flat wall, clean symmetrical layout, empty center space for character display, minimal props, vinyl sofa elements placed only on left and right edges, small round tables, milkshake glasses, 1950s american diner style, rounded shapes, glossy materials, soft daylight with subtle neon glow, simple, not cluttered, highly detailed, 3d environment, no people full room, interior scene, realistic room, deep perspective, wide space, ceiling, complex background, cluttered scene, multiple rooms, realistic restaurant, people, characters