{
  "title": "Bismuth Hopper Inlay",
  "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": "Flat polished opaque resin inlay incorporating small bismuth-inspired square hopper crystal slices. Layered right-angle stair-step terraces read as angular concentric bands within irregular fragments, restrained teal-magenta-bronze patina color under resin, scattered in deep almost black binding. Flush flat finish, static color interpretation, no crystal objects sticking out, no neon emissive lines. 24 cm square. 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": 2161680,
      "sha256": "4587df5909f465f0935675fdd3dfbf9a2df64d939625362aed7031870c959cf2"
    },
    {
      "file": "textures/normal-gl.png",
      "colorSpace": "Non-Color",
      "bytes": 1531079,
      "sha256": "abf33566b18165e94b7daa2f17c2b27671162f2e63e695e8bb5b1d6684b4604a"
    },
    {
      "file": "textures/roughness.png",
      "colorSpace": "Non-Color",
      "bytes": 365527,
      "sha256": "384d54be8f7280fda89f28b2f7d74a81954e7fd3486a4e05d2f8460d65935f97"
    }
  ],
  "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": 3.848,
    "topBottomMeanAbsRGB": 3.402
  },
  "suggestedTileMeters": 0.24,
  "metallicConstant": 0,
  "normalStrength": 0.48,
  "beforeEdgeDiagnostics": {
    "leftRightMeanAbsRGB": 16.499,
    "topBottomMeanAbsRGB": 13.51
  }
}