{
  "title": "Silver Vein-Cut Travertine",
  "origin": "AI-generated with built-in image_gen; prepared by Locker3d",
  "date": "2026-10-26",
  "resolution": [
    1024,
    1024
  ],
  "license": "CC0-1.0, following the official Locker3d texture policy",
  "prompt": "Use case: photorealistic-natural. Asset type: square 1K albedo/base-color texture for a real downloadable 3D material. Subject: silver vein-cut travertine, a flat continuous slab cut along its bedding, delicate roughly horizontal flowing mineral bands in warm silver gray, pale limestone, taupe and a little cream, fine elongated open pores following the grain, naturally uneven band spacing, fine mineral granularity. The surface is honed, not polished; pore cavities are small and restrained, not dramatic black cracks. Full image represents about 1.2 meters of stone; this is an illustrative scale. Orthographic perpendicular macro material photography, full bleed on all sides with an even density of variation, no focal object. Natural photographic detail, no artificial sharpened edges. Uniform flat cross-polarized diffuse lighting, intrinsic colors only. No baked shadows, directional highlights, reflection, vignette, perspective, seams between panels, tile grout, props, sphere, room, letters, logos, borders, labels or watermark. Designed as a repeating material, with flow continuing through opposite edges and no large unique focal motif.",
  "maps": [
    {
      "file": "textures/albedo.png",
      "colorSpace": "sRGB",
      "bytes": 2208939,
      "sha256": "58d5c79fa4b49b2f8db5a35f182197316bb0543327f83393bcfb66879d93d3a4"
    },
    {
      "file": "textures/normal-gl.png",
      "colorSpace": "Non-Color",
      "bytes": 1643456,
      "sha256": "309aa2f9b853827684708a3daca38bebe0ff00b4126ae7c60a3bac3062370673"
    },
    {
      "file": "textures/roughness.png",
      "colorSpace": "Non-Color",
      "bytes": 451069,
      "sha256": "bf367668cdfb947203afa192505319366e86ac342812feae97c94f443c5b22a8"
    }
  ],
  "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": 6.415,
    "topBottomMeanAbsRGB": 4.048
  },
  "suggestedTileMeters": 1.2,
  "metallicConstant": 0,
  "normalStrength": 0.65,
  "beforeEdgeDiagnostics": {
    "leftRightMeanAbsRGB": 22.238,
    "topBottomMeanAbsRGB": 17.549
  }
}