{
  "tool": "Built-in image generation",
  "imageFile": "light-guard-illustration.png",
  "createdDate": "2026-09-07",
  "referenceRole": "Newly authored GLB three-quarter render used as visual reference",
  "referenceFile": "light-guard-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 Light Guard, not a historical photograph. Preserve the vessel's distinctive proportions, mast count, deck structures and rig arrangement. Comparative canal schooner barge interpretation, exactly three bare masts with furled gaff gear, hatches, low aft cabin, light upper hull. No deployed canvas, funnel or machinery. 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: NOAA establishes the canal-sized schooner barge, but no securely identified complete portrait or rig plan was recovered. Three bare masts, low aft cabin and hatches are a comparison-based interpretation informed by an ambiguously attributed fleet image. Exact rig and deck layout remain uncertain.",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "clean",
    "imageSha256": "1ee1874888928c81778e4b9efc22d03901e5e571b4432a786a7d192b9bcc5fac",
    "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": "1ee1874888928c81778e4b9efc22d03901e5e571b4432a786a7d192b9bcc5fac"
}