{
  "tool": "Built-in image generation",
  "imageFile": "john-t-johnson-illustration.png",
  "createdDate": "2026-09-07",
  "referenceRole": "Newly authored GLB three-quarter render used as visual reference",
  "referenceFile": "john-t-johnson-model-three-quarter.png",
  "historicalStatus": "Supplemental interpretive artwork, not documentary evidence or an exact GLB render",
  "generationPrompt": "Use case: historical-scene. Create a detailed photorealistic-style maritime reconstruction illustration for Michigan Lake Depths. Input image 1 is a reference render of our newly authored interpretive 3D model of John T. Johnson, not a historical photograph. Preserve the vessel's distinctive proportions, mast count, deck structures and rig arrangement. Wooden lumber schooner barge with exactly two unequal bare masts, tall foremast and much shorter aft mast, furled gaff gear, stacks of sawn lumber and low aft cabin. No deployed sails or funnel. Show the entire vessel including every mast tip and bow projection on calm Lake Huron water, in soft natural daylight with a low distant shoreline. Elevated three-quarter side view, generous framing margins, realistic timber/metal/canvas texture and fine working rigging. Retain the same main arrangement as the model while making the scene convincing. No added ships, people, text overlays, logos or watermark. This is interpretive artwork, not documentary evidence. Historical limitation for context: The historical photograph guides two unequal masts, a low aft cabin and a large deck load of lumber. Wreck evidence supports a centerboard trunk. Exact load quantity, covered deck arrangement, hull lines and paint are inferred. No powered propulsion is added.",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "clean",
    "imageSha256": "67a10de13373a1d8b5b7312c92d60b324c7c849b3c2f1ebf7920b21953ef5fb6",
    "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": "67a10de13373a1d8b5b7312c92d60b324c7c849b3c2f1ebf7920b21953ef5fb6"
}