{
  "title": "Abalone Shell Mosaic",
  "origin": "AI-generated with built-in image_gen; prepared by Locker3d",
  "date": "2026-11-07",
  "resolution": [
    1024,
    1024
  ],
  "license": "CC0-1.0, following the official Locker3d texture policy",
  "prompt": "Opaque decorative mosaic of thin abalone-like nacre tesserae in small irregular hand-cut shards, in a tight staggered layout with narrow dark epoxy hairline seams. Quiet celadon, blue petrol, pale lavender and silver layered shell striations; approximate static palette, no blown highlights, clean precise flush surface, no jewel objects. 30 cm square, about 12\u201318 irregular pieces per side. Photorealistic square diffuse/albedo texture asset for a PBR material library, perpendicular orthographic view of a continuous flat surface, full bleed, no object, scene, border, scale ruler, text or watermark. Neutral uniformly diffuse cross-polarized illumination, no cast shadows, AO, directional shading, vignette, strong glints or reflections. Preserve intrinsic detail at consistent scale. Edges intended to tile, avoid a single dominant mark and broad lightness gradients. 1024 square or higher. This is a visual material study.",
  "maps": [
    {
      "file": "textures/albedo.png",
      "colorSpace": "sRGB",
      "bytes": 2241741,
      "sha256": "605a044eedf42b827dbec5c313231218aa4fdafe564ecc149afdce36f358e98e"
    },
    {
      "file": "textures/normal-gl.png",
      "colorSpace": "Non-Color",
      "bytes": 1352760,
      "sha256": "07fa23cc96434e0df3d32cb49e8e92447b22fbb9c6787e3af19872f7931acc52"
    },
    {
      "file": "textures/roughness.png",
      "colorSpace": "Non-Color",
      "bytes": 330386,
      "sha256": "ae19aa02d44eaf4996ae090b38de2ba86321451fbaf15acbfc9e2cd141cb88d8"
    }
  ],
  "method": "Albedo: periodic-plus-smooth decomposition via FFT Poisson solve to reduce edge mismatch. Normal: periodic multi-scale Gaussian bands, robust contrast normalization, material-specific cavity/joint masks and central-difference tangent-space gradients. Roughness: material preset plus local detail and joint variation. All data channels are estimates, not measured surface response.",
  "limits": "Not a photoscan. No AO, displacement or metallic maps. Generated images are not guaranteed seamless; inspect repetition at your target scale. No measured physical scale; demo scale is illustrative.",
  "edgeDiagnostics": {
    "leftRightMeanAbsRGB": 5.174,
    "topBottomMeanAbsRGB": 4.15
  },
  "suggestedTileMeters": 0.3,
  "metallicConstant": 0,
  "normalStrength": 0.52,
  "beforeEdgeDiagnostics": {
    "leftRightMeanAbsRGB": 15.423,
    "topBottomMeanAbsRGB": 16.953
  }
}