{
  "tool": "Built-in image generation",
  "imageFile": "michael-groh-illustration.png",
  "createdDate": "2026-09-07",
  "referenceRole": "Newly authored GLB three-quarter render used as visual reference",
  "referenceFile": "michael-groh-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 Michael Groh in its ORIGINAL small c.1867 form, BEFORE its 1881–82 enlargement. Follow the attached newly authored 3D model render: compact 120.4 foot wooden hull, 23.8 foot beam, two bare working masts, ONE narrow black funnel aft of midships, small cabins at the STERN with an elevated aft wheelhouse, two low stacks of sawn lumber on the open deck forward of the machinery. Do not put a wheelhouse at the bow. No sails. Underway on blue Lake Superior, forested Grand Island distant, clear slanting afternoon light and subtle coal smoke. Elevated starboard bow three-quarter view showing the complete ship, with room around both mast tops and short bowsprit. Rich timber details, individual plank ends in the lumber load, rigging and period fittings. No modern equipment, extra funnels or extra masts. This is a historically informed hypothesis of its early form, not a documentary photograph. No text or watermark.",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "clean",
    "imageSha256": "95aabb276614b491a0463983acd545721cbfd70e0360ae2ba5b58927d038973d",
    "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": "95aabb276614b491a0463983acd545721cbfd70e0360ae2ba5b58927d038973d"
}