{
  "title": "Flamed Blue Granite",
  "origin": "AI-generated with built-in image_gen; prepared by Locker3d",
  "date": "2026-11-05",
  "resolution": [
    1024,
    1024
  ],
  "license": "CC0-1.0, following the official Locker3d texture policy",
  "prompt": "Use case: photorealistic-natural. Asset type: square diffuse/albedo map for an exterior stone PBR material. Subject: a continuous flamed-finish blue-gray granite surface, fine interlocking pale gray quartz and muted steel-blue feldspar crystals with small charcoal mica flecks. The defining finish is evenly rough and microfractured: tiny angular chipped crystal faces, shallow irregular pits and a restrained granular crust, rather than a honed smooth slab or polished speckle print. Illustrative surface area 40 cm square, most mineral grains about 1 to 6 mm, no giant stones, large veins, repeated blobs, tile joints, grout, saw lines, cracks, stains or weathering streaks. Neutral bluish gray overall, subtle variation between actual mineral grains, natural irregular distribution without a focal patch. Perpendicular orthographic macro material photography, consistent scale, full bleed, opposite edges designed to repeat. Uniform neutral cross-polarized diffuse illumination for intrinsic base color: no gloss reflections, glitter, baked glints, directional relief shadows, ambient occlusion, room reflections, vignette or gradient. Preserve material and micrograin color without artificial sharpening or black outlines. Real photographic stone surface, not asphalt, concrete aggregate, noise, a polished countertop or an illustration. No sphere, architecture scene, object, perspective, letters, logos, labels, border or watermark. Output square at least 1024 pixels.",
  "maps": [
    {
      "file": "textures/albedo.png",
      "colorSpace": "sRGB",
      "bytes": 2477850,
      "sha256": "21268897d81f6293e270ad7b89974863dcfd91bcc41fd59b3bc3306d042e347f"
    },
    {
      "file": "textures/normal-gl.png",
      "colorSpace": "Non-Color",
      "bytes": 1932621,
      "sha256": "7dc2e77309fa735ae621aae9f70b35f90b6eef4a0ee83ccf3337804659e2d06a"
    },
    {
      "file": "textures/roughness.png",
      "colorSpace": "Non-Color",
      "bytes": 388944,
      "sha256": "78fe0cf6657654120e8f6249a5dd65f5b7b972cd48d6b9fcd7688f1619940706"
    }
  ],
  "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": 7.62,
    "topBottomMeanAbsRGB": 7.415
  },
  "suggestedTileMeters": 0.4,
  "metallicConstant": 0,
  "normalStrength": 0.8,
  "beforeEdgeDiagnostics": {
    "leftRightMeanAbsRGB": 23.947,
    "topBottomMeanAbsRGB": 26.153
  }
}