{
  "title": "Tamped Rammed Earth",
  "origin": "AI-generated with built-in image_gen; prepared by Locker3d",
  "date": "2026-11-13",
  "resolution": [
    1024,
    1024
  ],
  "license": "CC0-1.0, following the official Locker3d texture policy",
  "prompt": "One square photoreal PBR diffuse/albedo texture of a real, dry, compacted rammed earth interior wall, front-on perpendicular view at illustrative architectural scale: about 1.15 metres across. The entire frame is a single level flat wall face. Genuine tamped earth visual character: around eight to ten horizontal lifts of compacted earth, with softly interrupted and minutely irregular boundaries, tan and warm sandy brown natural soil, alternating subtle density and warmth from one lift to the next. Keep the layering natural and restrained, visible but without prominent dark stripes. Each change has a little sandy clay grain, pinhead aggregate and occasional very small muted brown mineral flecks pressed flush into the matrix. Subdued pores and mottling, no glossy surfaces. Layer boundaries remain consistently horizontal and mostly continuous all the way left to right, vertically staggered only by minor real tamping irregularities. The edges must match in tone and horizontal layer position on left and right, with top and bottom in a similar warm tan band and no abruptly cut stripe, so tiled repeats have no frame or obvious seam. Flat broad cross-polarized light with no highlights, vignette, perspective, directional shading or cast shadows. A tactile compacted soil face, with no cuts or deep grooves, no brick blocks, mortar, stacked stone, wood grain, formboard imprint, bolt holes, stucco swirls, cracks, roots, wall corners, objects, markings or text. Fine-grained uniform focus and full bleed, a credible material sample rather than a scenic photograph.",
  "maps": [
    {
      "file": "textures/albedo.png",
      "colorSpace": "sRGB",
      "bytes": 2078449,
      "sha256": "e800e13930277436661cd910e4d78cbc262557dab37c9b99719cb6ab6c4b6115"
    },
    {
      "file": "textures/normal-gl.png",
      "colorSpace": "Non-Color",
      "bytes": 1856182,
      "sha256": "eedd36c90d8243cbf390f53b01ca9ab04bce338cc8031b0d2bf66f664b399a03"
    },
    {
      "file": "textures/roughness.png",
      "colorSpace": "Non-Color",
      "bytes": 468594,
      "sha256": "0a1ff8178f91790550d0d47739d60997834498dd4d6638da4c35f1c3d894cb33"
    }
  ],
  "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": 3.386,
    "topBottomMeanAbsRGB": 3.254
  },
  "suggestedTileMeters": 1.15,
  "metallicConstant": 0,
  "normalStrength": 0.65,
  "beforeEdgeDiagnostics": {
    "leftRightMeanAbsRGB": 9.062,
    "topBottomMeanAbsRGB": 12.944
  }
}