{
  "checkedAt": "2026-10-19",
  "purpose": "Locally bundled 3D material assets; not product photographs",
  "assets": [
    {
      "id": "oak_veneer_01",
      "source": "https://polyhaven.com/a/oak_veneer_01",
      "license": "CC0-1.0",
      "licenseURL": "https://polyhaven.com/license",
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          "path": "装修方案研究/PBR/oak_veneer_01_rough_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/oak_veneer_01/oak_veneer_01_rough_1k.jpg",
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      "source": "https://polyhaven.com/a/white_plaster_02",
      "license": "CC0-1.0",
      "licenseURL": "https://polyhaven.com/license",
      "files": [
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          "path": "装修方案研究/PBR/white_plaster_02_diff_1k.jpg",
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          "path": "装修方案研究/PBR/white_plaster_02_nor_gl_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/white_plaster_02/white_plaster_02_nor_gl_1k.jpg",
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          "path": "装修方案研究/PBR/white_plaster_02_rough_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/white_plaster_02/white_plaster_02_rough_1k.jpg",
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    {
      "id": "leather_white",
      "source": "https://polyhaven.com/a/leather_white",
      "license": "CC0-1.0",
      "licenseURL": "https://polyhaven.com/license",
      "files": [
        {
          "role": "Diffuse",
          "path": "装修方案研究/PBR/leather_white_diff_1k.jpg",
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          "path": "装修方案研究/PBR/leather_white_nor_gl_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/leather_white/leather_white_nor_gl_1k.jpg",
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          "role": "Rough",
          "path": "装修方案研究/PBR/leather_white_rough_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/leather_white/leather_white_rough_1k.jpg",
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    {
      "id": "marble_01",
      "source": "https://polyhaven.com/a/marble_01",
      "license": "CC0-1.0",
      "licenseURL": "https://polyhaven.com/license",
      "files": [
        {
          "role": "Diffuse",
          "path": "装修方案研究/PBR/marble_01_diff_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/marble_01/marble_01_diff_1k.jpg",
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        {
          "role": "nor_gl",
          "path": "装修方案研究/PBR/marble_01_nor_gl_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/marble_01/marble_01_nor_gl_1k.jpg",
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        {
          "role": "Rough",
          "path": "装修方案研究/PBR/marble_01_rough_1k.jpg",
          "url": "https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/marble_01/marble_01_rough_1k.jpg",
          "md5": "59cef1be1b7376c9d0dcc7a64adf7882",
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    }
  ],
  "licenseStatement": "All selected Poly Haven assets are CC0-1.0. The official license permits commercial use and redistribution. Website example renders/logos were not downloaded or incorporated.",
  "assetUse": "These are finish texture references, not exact purchased product specifications or manufacturer CAD models.",
  "runtimeDerivation": {
    "marble_01": "Original downloaded JPEG files preserved and SHA-256 verified. Browser Canvas crops all three channels from (85,245,320,170) in the 1024x1024 original. Diffuse is blended with warm white; a 3-pixel grout edge and paired normal/roughness edges form a 600 mm square porcelain tile. Used as fine stone-pattern material reference, not as natural marble procurement specification. Warm-white overlay is 54%, floor tint remains the selected pale greige instead of being whitened, and roughness is 0.82 for a matte porcelain appearance.",
    "oak_veneer_01": "Original diffuse/OpenGL normal/roughness maps, 1.8 m scan repeat; material palette tint and low normal intensity.",
    "white_plaster_02": "Diffuse scan deliberately unused: new painted walls, ceilings, beams and warm-white furniture use a constant clean cream paint color. Only OpenGL normal and roughness are used, at true 1 m repeat and restrained normal strength 0.035–0.045. Countertop uses constant warm-white solid-surface color.",
    "leather_white": "Original diffuse/OpenGL normal/roughness maps, 0.3 m scan repeat; only visual reference for wipeable upholstery, not an assertion of actual leather procurement."
  },
  "implementation": {
    "bundle": "三维源文件/pbr-assets.js contains original JPEG bytes as data URLs. Viewer does not request external assets.",
    "lifecycle": "A module-scoped Image cache keeps each of the 12 decoded source images once. Each rebuild creates its own disposable Texture objects; disposal cancels pending listeners.",
    "geometryUV": "applyPhysicalUVs uses metre-based planar projections. Original vertices, placement and collision envelopes remain unchanged."
  }
}