{
  "tool": "OpenAI built-in image generation",
  "imageFile": "mediator-illustration.png",
  "createdDate": "2026-09-08",
  "revisedDate": "2026-09-08",
  "referenceRole": "Targeted edit of the previous AI illustration; no new period photograph or direct render supplied in this edit",
  "referenceFiles": [
    "mediator-illustration.png"
  ],
  "derivedFrom": {
    "imageSha256": "904c557c739d1e83d4e4238998e080d0b65ead6844fcc03f4183fabe724e2bbd",
    "previousGenerationProvenance": {
      "tool": "Built-in image generation",
      "imageFile": "mediator-illustration.png",
      "createdDate": "2026-09-08",
      "referenceRole": "Newly authored GLB three-quarter render used as visual reference",
      "referenceFile": "mediator-model-three-quarter.png",
      "historicalStatus": "Supplemental interpretive artwork, not documentary evidence or an exact GLB render",
      "generationPrompt": "Create one detailed, realistic maritime reconstruction illustration for Michigan Lake Depths. Use the provided newly authored 3D model as the primary shape reference: preserve the vessel's hull proportions, mast count, funnel count and positions, cabin heights, deck organization and lifeboats. Show the complete ship afloat at its plausible working waterline, in a natural three-quarter view with ample framing and a Lake Superior / Keweenaw wooded shoreline far in the background. Premium museum interpretive maritime illustration, believable materials, subtle weathering, finely resolved rigging and timber. This is artistic reconstruction, not a historical photograph or exact archaeological record. No text overlay, border, logo, modern vessel, modern skyline or extra funnels. Weather and shoreline are artistic choices, not a portrayal of documented loss conditions. No deployed sails, damage, sinking, fire, dramatic peril or ocean-sized waves. Mediator, later circa1890 three-mast schooner-barge interpretation,127ft hull26ft beam. EXACTLY THREE masts, no funnel, no steam smoke, no deployed sails. Stowed canvas/booms and standing rigging as reference, low aft cabin with skylight, square stern, unobstructed hatch deck, short inferred bowsprit. At quiet anchorage after a passing rain shower, glossy wet timber, low rain clouds retreating over distant forested shore, narrow cool sunlight breaking through, light freshwater chop with gentle reflections. A few visible rain streaks in distant background, ship itself remains crisp and readable. No large wake because unpowered."
    }
  },
  "historicalStatus": "AI-generated interpretive artwork; not documentary evidence or an exact GLB render",
  "generationPrompt": "Edit the supplied AI interpretive ship illustration with a narrow correction. Remove every orange rust streak from the white/grey upper hull and aft cabin. Replace the rusted metallic hull with painted wooden planking, subtle horizontal seams and natural grey weathering only. Preserve three bare masts, furled sail bundles, hatches, low aft cabin and rainy sunbreak scene exactly. Preserve framing, aspect ratio, lighting and all unmentioned details. Keep deck winches as squat transverse rope drums with solid flanges, never barrels. No text, no lettering, no name boards, no guns, no weapons, no cannon, no watermark. No extra masts or floating parts. Do not add modern equipment. This remains an interpretive illustration, not historical photographic evidence.",
  "revisionReason": "Remove every orange rust streak from the white/grey upper hull and aft cabin. Replace the rusted metallic hull with painted wooden planking, subtle horizontal seams and natural grey weathering only. Preserve three bare masts, furled sail bundles, hatches, low aft cabin and rainy sunbreak scene exactly.",
  "imageSha256": "517a52cf5647f35cd56d3782930565ad70e93536122c987acefe89a6a536b687",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "regenerated",
    "imageSha256": "517a52cf5647f35cd56d3782930565ad70e93536122c987acefe89a6a536b687",
    "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."
  },
  "referenceFile": "mediator-illustration.png"
}