{
  "title": "Dendritic Limestone",
  "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": "Cream matte split limestone with very thin branching brown-black manganese-like mineral dendrites, flat fern-like branching deposits at several angles and sizes, pale fine calcite matrix with hairline speckles. Branches are surface markings with no physical leaf fibers, no relief grooves or shell fossils. Show a believable 45 cm square sample with irregular gaps and multiple subtle branching groups. 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": 2077432,
      "sha256": "e8bd7b7835d8fa86d0b8472fc07dea1386b8e9933a18cdd8a98fb5692b75feac"
    },
    {
      "file": "textures/normal-gl.png",
      "colorSpace": "Non-Color",
      "bytes": 1063847,
      "sha256": "606d0135f87b29c1069b19f0a9e3b78036a5f1256ae1db65f0f58fafde06bce9"
    },
    {
      "file": "textures/roughness.png",
      "colorSpace": "Non-Color",
      "bytes": 283607,
      "sha256": "7085f63cd7edda9269a56eedb3bd9aecec1e0e25754999d9ed12462aecef92f0"
    }
  ],
  "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": 3.025,
    "topBottomMeanAbsRGB": 2.734
  },
  "suggestedTileMeters": 0.45,
  "metallicConstant": 0,
  "normalStrength": 0.46,
  "beforeEdgeDiagnostics": {
    "leftRightMeanAbsRGB": 9.246,
    "topBottomMeanAbsRGB": 8.421
  }
}