{
  "tool": "OpenAI built-in image generation",
  "imageFile": "hettler-illustration.png",
  "createdDate": "2026-09",
  "revisedDate": "2026-09-08",
  "referenceRole": "Targeted edit of the previous AI illustration; no new period photograph or direct render supplied in this edit",
  "referenceFiles": [
    "hettler-illustration.png"
  ],
  "derivedFrom": {
    "imageSha256": "bfc844090879ef090dfe53c5c763282f482f590354ce876cd29de4fd70149e1a",
    "previousGenerationProvenance": {
      "tool": "Built-in image generation",
      "imageFile": "hettler-illustration.png",
      "referenceRole": "Modern GLB render used as visual reconstruction reference; Hettler also used the linked Pesha historical photograph",
      "historicalStatus": "Supplemental interpretive artwork, not documentary evidence or an exact GLB render",
      "generationBrief": "Herman H. Hettler c.1915 wooden steam freighter, two bare working masts, one aft funnel, forward open flying bridge, deck lumber, Lake Superior in warm late-afternoon light."
    }
  },
  "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 all HERMAN H. HETTLER lettering on the white forward bulwark and any other lettering. Replace it with uninterrupted plain white-painted wooden planking. Preserve every other visible feature, people, hull, lumber load, masts and funnel. 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 all HERMAN H. HETTLER lettering on the white forward bulwark and any other lettering. Replace it with uninterrupted plain white-painted wooden planking. Preserve every other visible feature, people, hull, lumber load, masts and funnel.",
  "imageSha256": "1be5b43706b1e0b3d04dc1dadcd3e70b7f6eedb0f3b6f6a288116ada0d41e63a",
  "artefactCheck": {
    "date": "2026-09-08",
    "crops": [
      "bow",
      "midships",
      "stern",
      "rig-superstructure"
    ],
    "nativePixelInspection": true,
    "result": "regenerated",
    "imageSha256": "1be5b43706b1e0b3d04dc1dadcd3e70b7f6eedb0f3b6f6a288116ada0d41e63a",
    "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": "hettler-illustration.png"
}