{
  "title": "Suminagashi Marbling Paper",
  "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": "Off-white matte Japanese marbled paper, floating ink traces in many very thin irregular muted charcoal and indigo contour loops with organic stretched bends, subtle flat handmade fiber texture. No decorative metallic flakes, folds, paper edges, lettering, spotlights, giant singular swirl or acrylic impasto. 38 cm square, distributed motifs with breathing room. 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": 1821822,
      "sha256": "4f91d5f4afae8a9dd0f4f0a7bd0ad5095191a4323c7bb73865a8307b0a905a77"
    },
    {
      "file": "textures/normal-gl.png",
      "colorSpace": "Non-Color",
      "bytes": 1006580,
      "sha256": "d9f5c1caed8c30c124b8482ac02f72b4f966dd344589764cac323b2e657fa721"
    },
    {
      "file": "textures/roughness.png",
      "colorSpace": "Non-Color",
      "bytes": 279900,
      "sha256": "981d1381f4336de3049f6ebad464366a38d7738886628bb1cd691dba0a14ccd0"
    }
  ],
  "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": 2.505,
    "topBottomMeanAbsRGB": 2.087
  },
  "suggestedTileMeters": 0.38,
  "metallicConstant": 0,
  "normalStrength": 0.42,
  "beforeEdgeDiagnostics": {
    "leftRightMeanAbsRGB": 6.737,
    "topBottomMeanAbsRGB": 8.979
  }
}