{
  "tool": "Built-in image generation",
  "imageFile": "manhattan-illustration.png",
  "createdDate": "2026-09-07",
  "referenceRole": "Newly authored GLB three-quarter render used as visual reference",
  "referenceFile": "manhattan-model-three-quarter.png",
  "historicalStatus": "Supplemental interpretive artwork, not documentary evidence or an exact GLB render",
  "generationPrompt": "Create a richly detailed, realistic maritime reconstruction illustration of the Great Lakes wooden steam freighter Manhattan in its original c.1887 appearance, underway on Lake Superior near forested Grand Island. Use the attached newly authored 3D reconstruction render as the vessel's visual baseline: long 252.4 foot wooden hull, 38 foot beam, EXACTLY THREE bare working masts and EXACTLY TWO narrow dark aft funnels, forward wheelhouse, low long aft cabin, cargo hatches along open amidships deck. Preserve those major features and proportions. Warm slanting early morning light, subtle coal smoke from both funnels, rippled blue-green water at a plausible loaded waterline, distant forested shoreline. Elevated starboard bow three-quarter view, entire ship including every mast top and bowsprit comfortably inside frame, landscape composition. Add credible wood grain, seams, rope and metal details without modern machinery, radar, modern railings or extra sails. Historically informed interpretive artwork, not a documentary photograph. No text, labels or watermark.",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "clean",
    "imageSha256": "bf2ff192cf344369f27a940a0ab48989790ca4fe0ce3a468c4d8c2bd2ea7b421",
    "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."
  },
  "imageSha256": "bf2ff192cf344369f27a940a0ab48989790ca4fe0ce3a468c4d8c2bd2ea7b421"
}