{
  "tool": "Built-in image generation",
  "imageFile": "julia-palmer-illustration.png",
  "createdDate": "2026-09-07",
  "referenceRole": "Newly authored GLB three-quarter render used as visual reference",
  "referenceFile": "julia-palmer-model-three-quarter.png",
  "historicalStatus": "Supplemental interpretive artwork, not documentary evidence or an exact GLB render",
  "generationPrompt": "Create a refined, highly detailed maritime reconstruction illustration of Julia Palmer for Michigan Lake Depths. Use the attached newly authored 3D model render as the principal reference for hull proportions, number and placement of masts, cabins, funnel and working fittings. Selected era: Original sailing career, circa 1836–1839. Preserve its distinctive geometry and sensible period scale. A warm, clear Great Lakes sailing afternoon circa 1836–1839, pale blue sky, gently rounded wavelets, thin high clouds, golden light on ivory canvas, a very distant low wooded shoreline. This is the original three-masted full-rigged sailing ship before conversion to a sidewheel steamer; no funnel, paddle wheels, engine, guns or fantastical ornament. Show the complete intact vessel in an elegant three-quarter view, afloat at a plausible waterline, bow to the left, with comfortable margin around all spars. The underwater hull is naturally hidden by lake water. Museum-quality realistic painted illustration, detailed wood planking, rigging where present, restrained historically plausible color, natural light and convincing water. Landscape 3:2 composition. No modern shoreline structures, no logos, no map pins, no text, no titles, no fake archival border. Do not create a studio model standing on a base. This is openly interpretive supplemental artwork, not documentary evidence: weather, light and distant shore are artistic choices, not recorded loss-day circumstances. Do not invent additional masts, funnels, superstructure or deployed sails absent from the reference.",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "clean",
    "imageSha256": "970414c253d9d5c1b73d68cefc0e6cdd0c35b991fd009bdc9c0b2a45a21d4c74",
    "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": "970414c253d9d5c1b73d68cefc0e6cdd0c35b991fd009bdc9c0b2a45a21d4c74"
}