{
  "id": "Discobolus",
  "title": "Discobolus — The Discus Thrower",
  "museumTitle": "Discobolus, Roman Copy with Modern Head",
  "originalDesign": "After Myron of Eleutherae, c. 450 BCE",
  "depictedObject": "Plaster cast KAS1549, Royal Cast Collection, SMK — National Gallery of Denmark",
  "museumRecord": "https://open.smk.dk/en/artwork/image/KAS1549",
  "metadataSource": "https://api.smk.dk/api/v1/art/?object_number=KAS1549",
  "officialModelListing": "https://sketchfab.com/3d-models/discobolus-the-discus-thrower-50f50abf45414ad8a658325df7a5fcb3",
  "sourceAsset": "https://upload.wikimedia.org/wikipedia/commons/f/fe/Diskoskasteren_%28Discobolos%29_-_KAS1549.stl",
  "sourceRecord": "https://commons.wikimedia.org/wiki/File:Diskoskasteren_(Discobolos)_-_KAS1549.stl",
  "sourceProvenance": "Wikimedia Commons mirror of SMK's full-resolution digitization of KAS1549, originally distributed in http://foto.smk.dk/digitale_afstoebninger.zip. Same museum cast as the official Sketchfab listing; the downloaded STL is the full scan rather than that listing's 10% derivative. The current museum API omits its former direct 3D download links.",
  "sourceBytes": 100849784,
  "sourceSha1": "13bbe6db9943c1d0ef4e9b4ad9ffda3200f119f9",
  "sourceSha256": "f1c9457f52590725ec6159cc9646f1a4517fa3d5360694ea9f7f1c7e8561ebd8",
  "rights": "CC0 1.0 Universal Public Domain Dedication",
  "rightsURL": "https://creativecommons.org/publicdomain/zero/1.0/",
  "museumObjectRightsURL": "https://creativecommons.org/publicdomain/mark/1.0/",
  "credit": "Digitization: SMK — National Gallery of Denmark. Original design after Myron. Public domain scan; web adaptation for IOM.",
  "museumDimensionsM": {"height": 1.70, "width": 1.15, "depth": 0.50},
  "assetDimensionsM": {"height": 1.7000000476837158, "width": 1.0484825372695923, "depth": 0.5246952176094055},
  "scaleNote": "Uniformly normalized to the museum's documented 1.70 m total height. The scan's width and depth retain its actual proportions rather than being stretched to catalog measurements.",
  "curatorialText": "An athlete gathers his body before releasing the discus. The pose follows Myron's lost Greek bronze of around 450 BCE, known through Roman copies. This digital model records SMK's plaster cast after a Roman marble found at Hadrian's Villa. Its head is a modern restoration that faces differently from the original design. The cast entered SMK from the Academy of Art in 1909.",
  "curatorialSources": [
    "https://open.smk.dk/en/artwork/image/KAS1549",
    "https://api.smk.dk/api/v1/art/?object_number=KAS1549",
    "https://sketchfab.com/3d-models/discobolus-the-discus-thrower-50f50abf45414ad8a658325df7a5fcb3"
  ],
  "preparation": "Blender 5.2.0 LTS: reduced from 2,016,994 to 45,000 triangles, smooth normals, opaque texture-free plaster PBR material, Draco compression (16-bit positions, 12-bit normals). Source preserved. Mesh Discobolus_sculpture; identity transform; glTF +Y up, front/chest toward +Z, bottom Y=0, centered X/Z. The museum scan's integral base is retained.",
  "meshName": "Discobolus_sculpture",
  "materialName": "discobolus_plaster",
  "triangles": 45000,
  "vertices": 22494,
  "derivativeBytes": 137092,
  "derivativeSha256": "d1bfc62b7ea57b01f6ab2823338eb5cdd8b565e2d9cb31127f3c61d2e865b9a1",
  "sampledSurfaceDeviation": {"samples": 24000, "meanMm": 0.20767702608433814, "p95Mm": 0.6036532344296573, "maxMm": 1.272495253942907},
  "validation": "GLB reimported in Blender and decoded with the gallery's Three.js Draco loader in Chrome. Watertight positive-volume mesh, one identity node, no external resources or textures. Front, three-quarter, back, and phone preview inspected. Deviation is a sampled two-way surface-distance estimate, not an exhaustive Hausdorff bound."
}