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  "prompt": "A top-down flat lay studio photograph, camera looking straight down, of seven material samples from Venetian rooms of stone and still water, laid on a matte warm light-grey paper backdrop. The samples are arranged in a calm, balanced, slightly asymmetric composition with generous even spacing; the anchor piece is the largest, and one or two samples overlap a neighbour slightly. Each sample is a small, plainly cut offcut of the real material, as an architect\u0027s supplier would send it, matching the material, finish and colour of the named room. Do not depict the buildings or any part of them: no architectural forms, no openings, no ornament, no carving, no motifs. The samples: (1) the largest piece and the anchor, a thick slab of pale cream-grey dense limestone, honed and matte, with faint veins and soft cloudy patches and no open pores, square sharp arrises, one corner cut off at 45 degrees and one thin straight saw-cut slot across it, as used at Fondazione Querini Stampalia, Venice, the floating slabs of the water entrance; (2) a short block of grey concrete with a shallow straight channel cut along it holding still, clear, lagoon-green water that mirrors the softbox; the concrete below the water line is darker and wet, with a thin band of green algae and a pale tide line above it, as used at Fondazione Querini Stampalia, Venice, water entrance; (3) a square tile of deep neutral black marble, no veins and no white lines at all, polished to a mirror, sharp square arrises, a thin film of perfectly still water lying on it like a black mirror, as used at Negozio Olivetti, Venice, the black marble basin; (4) a square of copper sheet, warm copper brown with a darker brown patina, crossed by soft green-blue verdigris streaks running in one direction as if water had flowed over it, satin to matte, as used at Fondazione Querini Stampalia, Venice, garden basin and channel; (5) a tile of washed concrete in a muted green-grey with exposed small gravel and a trace of moss in one corner, bordered on one side by a strip of pale Istrian limestone about 9 cm wide, weathered, with a fine crack, as used at Fondazione Querini Stampalia, Venice, garden paving; (6) a square of vein-cut travertine, cream to beige with parallel vertical streaks and a few rust-brown streaks, the pores left open, honed matte, with a thin dark metal flat laid along one edge, as used at Fondazione Querini Stampalia, Venice, Sala (Aula) Luzzatto wall panels; (7) a small plain sawn block of alabaster, warm translucent white, waxy satin surface, faint cloudy veils inside, light glowing through its thin edge; plain cut faces, no carving, as used at Fondazione Querini Stampalia, Venice, stone at the ends of the small garden water channel. Soft directional studio light from the upper left, like a large softbox, with a gentle fill; real soft shadows and contact shadows under every sample. Macro-level texture is visible on every surface. Neutral, calm, true colour; photographed on a medium-format camera, sharp and detailed, a well-composed professional studio photograph of an architect\u0027s material board. No text, no labels, no letters, no numbers, no logos, no tags or stickers. No people, no hands. No furniture, no plants, no flowers, no leaves, no props, no pens or tools, no house, no building, no architectural model, no room, no landscape. No emblems, no interlocking circles or ring motifs, no round windows, no carved figures or sculpture. No splashes, no ripples, no droplets in the air, no flowing water, no fountains, no water spout. Only the seven material samples on the backdrop.",
  "negative_prompt": null,
  "strength": null,
  "size": "1K",
  "aspect_ratio": null,
  "seed": null,
  "index": 0,
  "width": 1664,
  "height": 2080,
  "mime_type": "image/png",
  "source_image_path": null,
  "source_image_sha256": null,
  "source_is_viewer_capture": false,
  "camera": null,
  "control_image_path": null,
  "mask_path": null,
  "provider_job_id": "req_1ffb9b6248c84ee29b7e782b114cdcfb",
  "job_id": "rnd_49dc23bc244e",
  "session_id": null,
  "turn_depth": 0,
  "warnings": [
    "provider_options replaced fields this adapter had set: quality. Values are passed to OpenAI verbatim and unvalidated."
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  "cost_usd_estimate": 0.0788,
  "cost_source": "metered",
  "watermark": "c2pa",
  "elapsed_ms": 35947,
  "provenance": {
    "provider": "openai",
    "api_model": "gpt-image-2.5-sunburst",
    "endpoint": "v1/images/generations",
    "lane": "TextToImage",
    "size_requested": "1664x2080",
    "size_tier": "1K",
    "quality": "high",
    "output_format": "png",
    "watermark": "c2pa",
    "content_credentials": "c2pa",
    "moderation": "auto",
    "count": "1",
    "created": "2026-11-08T09:40:44.0000000Z",
    "size_reported": "1664x2080",
    "background": "opaque",
    "usage_input_tokens": "815",
    "usage_output_tokens": "2491",
    "usage_total_tokens": "3306",
    "usage_input_image_tokens": "0",
    "usage_input_text_tokens": "815"
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}