{
  "job_id": "11111111-1111-4111-8111-111111111111",
  "lease_id": "22222222-2222-4222-8222-222222222222",
  "request_digest": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
  "request": {
    "schema_version": 3,
    "inputs": [],
    "operation": {
      "scene": {
        "type": "recipe",
        "recipe_version": 1,
        "title": "材料实验室设备场景",
        "units": "meters",
        "materials": [
          {"id": "concrete", "base_color": "#B8BCC2", "roughness": 0.8},
          {"id": "steel", "base_color": "#55606A", "metallic": 0.75, "roughness": 0.28}
        ],
        "objects": [
          {
            "id": "floor",
            "kind": "geometry",
            "geometry": {"type": "box", "size": [12, 8, 0.2]},
            "transform": {"position": [0, 0, -0.1]},
            "material": "concrete",
            "modifiers": [{"type": "bevel", "width": 0.03, "segments": 2}]
          },
          {
            "id": "tank",
            "kind": "geometry",
            "geometry": {"type": "cylinder", "radius": 1.2, "depth": 3, "vertices": 64},
            "transform": {"position": [-3, 0, 1.5]},
            "material": "steel"
          },
          {
            "id": "process_pipe",
            "kind": "geometry",
            "geometry": {
              "type": "sweep",
              "path": [[-3, 0, 3], [-3, 0, 4], [0, 0, 4], [0, 0, 2]],
              "radius": 0.1,
              "resolution": 3
            },
            "material": "steel"
          },
          {
            "id": "kiln",
            "kind": "generator",
            "generator": "rotary_kiln",
            "parameters": {
              "length_m": 6,
              "outer_diameter_m": 0.8,
              "shell_thickness_m": 0.02,
              "lining_thickness_m": 0.08,
              "slope_percent": 3.5,
              "support_stations": 3,
              "drive_system": true,
              "burner": true,
              "hoods": true,
              "inspection_platform": true,
              "material_bed": true
            },
            "transform": {"position": [1.5, 1.5, 1.2]}
          },
          {
            "id": "qa_cone",
            "kind": "geometry",
            "geometry": {"type": "cone", "radius1": 0.5, "radius2": 0.1, "depth": 1},
            "transform": {"position": [100, 0, 0]},
            "material": "steel",
            "modifiers": [{"type": "array", "count": 2, "offset": [1, 0, 0]}],
            "visible": false
          },
          {
            "id": "qa_sphere_cutter",
            "kind": "geometry",
            "geometry": {"type": "sphere", "radius": 0.4},
            "transform": {"position": [100, 0, 0]},
            "visible": false
          },
          {
            "id": "qa_plane",
            "kind": "geometry",
            "geometry": {"type": "plane", "size": [1, 1]},
            "transform": {"position": [100, 0, 0]},
            "modifiers": [{"type": "solidify", "thickness": 0.02}],
            "visible": false
          },
          {
            "id": "qa_extrude",
            "kind": "geometry",
            "geometry": {"type": "extrude", "profile": [[0, 0], [1, 0], [0, 1]], "depth": 0.5},
            "transform": {"position": [100, 0, 0]},
            "modifiers": [{"type": "mirror", "axes": ["x"]}],
            "visible": false
          },
          {
            "id": "qa_revolve",
            "kind": "geometry",
            "geometry": {"type": "revolve", "profile": [[0.3, 0], [0.5, 0.5], [0.2, 1]], "segments": 32},
            "transform": {"position": [100, 0, 0]},
            "modifiers": [{"type": "boolean", "operation": "difference", "target": "qa_sphere_cutter"}],
            "visible": false
          },
          {
            "id": "qa_pipe",
            "kind": "geometry",
            "geometry": {"type": "pipe", "start": [0, 0, 0], "end": [1, 1, 1], "outer_radius": 0.2, "wall_thickness": 0.03},
            "transform": {"position": [100, 0, 0]},
            "visible": false
          },
          {
            "id": "label",
            "kind": "text",
            "text": "Materials Lab",
            "text_size": 0.6,
            "text_extrude": 0.02,
            "transform": {"position": [-2, 2.5, 0.2], "rotation_deg": [90, 0, 0]},
            "material": "steel"
          }
        ],
        "lights": [
          {"id": "key", "type": "area", "position": [4, -6, 8], "target": [0, 0, 1], "energy": 1500, "size": 6},
          {"id": "sun", "type": "sun", "position": [-8, -10, 12], "target": [0, 0, 0], "energy": 2.5}
        ],
        "render": {
          "width": 960,
          "height": 540,
          "background_color": "#20252B",
          "views": [
            {
              "name": "overview",
              "output_key": "preview_01",
              "position": [12, -14, 10],
              "target": [0, 0, 1.5],
              "projection": "perspective",
              "lens_mm": 52
            },
            {
              "name": "front",
              "output_key": "preview_02",
              "position": [0, -16, 3],
              "target": [0, 0, 1.5],
              "projection": "orthographic",
              "ortho_scale": 14
            }
          ]
        }
      }
    },
    "outputs": [
      {"key": "preview_02", "type": "figure", "format": "png"},
      {"key": "scene_glb", "type": "model", "format": "glb"}
    ]
  }
}