{
  "tool": "OpenAI built-in image generation",
  "imageFile": "nahant-illustration.png",
  "createdDate": "2026-09-08",
  "revisedDate": "2026-09-08",
  "referenceRole": "Revised model render",
  "referenceFile": "nahant-model-three-quarter.png",
  "referenceFiles": [
    "nahant-model-three-quarter.png"
  ],
  "historicalStatus": "AI-generated interpretive artwork; not documentary evidence or an exact GLB render",
  "generationPrompt": "Historical-scene illustration of Nahant, an 1873 wooden Great Lakes bulk freighter, in an evidence-informed comparison-based reconstruction. Preserve the supplied revised GLB render faithfully: long 213.3 ft wooden hull, small forward wheelhouse, compact aft accommodation, exactly ONE black aft funnel, exactly TWO cargo masts with booms and NO sails; EIGHT low separate cargo hatch covers across the long open central deck. No paddlewheels. Wooden hull with pale grey painted topsides, dark tarred lower hull: wood weathering can be soft grey and tan but absolutely NO orange rust streaks or rusty metal plating on this wooden hull. Deck winches are short paired cylindrical drums across the deck on low frames, without projecting gun barrels. Calm lightly rippled freshwater, pale morning daylight, distant low Escanaba shoreline without modern buildings. Full ship and mastheads in frame, starboard bow three-quarter as model, subtle waterline, restrained wake. No text, no lettering, no name boards, no guns, no weapons, no cannon, no watermark. No extra boats or masts, no floating parts or modern electronics. Artwork must track the model's silhouette and fittings rather than invent a new ship.",
  "imageSha256": "b540f0e1d72107dc3b0f9b272c596b65061f0697d7089e65914d38afe8674345",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "regenerated",
    "imageSha256": "b540f0e1d72107dc3b0f9b272c596b65061f0697d7089e65914d38afe8674345",
    "observations": "Four native-pixel crops inspected. No weapons, garbled lettering, material mismatch, added masts, disconnected fittings or modern equipment observed. Interpretive details and background scenery are not documentary evidence."
  }
}