Create exactly one high-detail reference photograph. This is one coherent image, without a contact sheet, labels, arrows or graphic panels.

Use photorealistic observational cinema, natural exposure and tactile material detail. Use rectilinear optics, soft highlight roll-off and very fine restrained grain. Preserve the difference between cool daylight, dry late sunlight and blue-black night; warm rooms have practical amber light. Give distant scenery atmospheric depth and keep foreground objects physically solid. People are comfortably dressed and absorbed in ordinary life. Architecture is personal and spacious. Avoid glossy resort advertising, decorative science-fiction clutter, excessive lens flare, fisheye distortion, posed glamour, captions, lettering, logos and borders.

The antique railway carriage has a dark walnut window frame with a slim dull-brass latch on the left upright, a broad rounded walnut sill and a deep blue-green wool seat below it. The rectangular window has gently rounded upper corners and clean glass with a few small rain beads. There are no screens, signage or luminous controls. Only the window, sill and seat portions actually inside the composition appear.

Make one 3:2 photographic railway interior study from a seated 35 mm-equivalent viewpoint. Show the walnut window's gently rounded upper corners, slim left-side brass latch, broad rounded sill and deep blue-green wool seat in the lower left. Through the glass is a neutral softly distant morning reed bed and water, without house or other landmark. Keep materials clear and geometry rigid. No people, bag, legible text or electronic displays.