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 space habitat is a completed open bracelet 3,000,000 kilometres in diameter. Its 6,000-kilometre-wide living surface faces inward, holding land, water and atmosphere. Sloped, mostly transparent retaining walls rise 1,000 kilometres at the two lateral edges. Its exterior structural base faces vacuum. A real star outside the bracelet supplies light. The central Hub floats independently, with no spokes, and is too small to resolve in these views. There is no central sun, planet, enclosing dome or solid disk filling the opening. The spin is roughly day-long and has negligible visible rotation over a few real-time seconds.

The observer is several ring diameters away and well outside the plane of the bracelet. The entire circular habitat projects as an ellipse with an almost horizontal major axis and a minor axis half that length. Centre it in the image with the major axis occupying 76 percent of the full image width, leaving empty black space around all of it. The living strip's 6,000-kilometre axial width is only 1:500 of the 3,000,000-kilometre diameter. The apparent ribbon is therefore exceptionally fine, at most a few pixels at a multi-thousand-pixel whole-ring view, with perspective-dependent thickness. Small wall height must not turn it into a deep cylinder or fat torus. Keep the centre black and empty at useful resolving scale. A natural star far outside the image illuminates the ring from a direction nearly parallel to its plane with a small out-of-plane offset. Restrained desaturated blue-white light catches parts of the inner face; dark parts have at most minute discontinuous habitation light. There are no individually recognisable continents, rivers, buildings or trees. Sparse stars remain behind the ring. Do not make the rim a uniform neon ellipse, enlarge the Hub, add spokes or place a star or planet inside it.

Make one 3:2 astronomical photograph of the entire exceptionally fine bracelet against sparse stars. The ellipse is centred, with 76 percent full-image width and a physical minor axis half the major axis. No foreground objects. Resolve overall form and partial illumination without inventing legible continents. Preserve ample empty black space.

Critical camera geometry: view from 30 degrees above the plane of the ring, not grazing along the plane. The ellipse must be HALF AS TALL AS IT IS WIDE in physical image pixels. On the requested 3072 by 2048 image its outside bounds are approximately x=369 to 2703 and y=440 to 1608, centred at (1536,1024): width 2334 pixels, height 1168 pixels. In normalized image coordinates the full ellipse is 0.76 image widths and 0.57 image heights. Do not flatten it into a narrow saucer. These dimensions describe only its outline; the actual habitat ribbon must remain an exceptionally thin 2-to-5-pixel material line, with large dim stretches and limited brighter reflected-light portions, without a continuous glow or luminous halo. The interior and all surrounding space remain black with sparse point stars.