{
  "id": "single-software-execution--cli--blender--task-35--ubuntu",
  "snapshot": "Blender-4.2.3",
  "instruction": "USD preview surface export `/home/user/Desktop/scene.blend` contains two unit cubes with Principled BSDF materials. Launch Blender by running `blender` from a terminal. On this machine, use `/opt/blender/blender` for Blender command-line or background runs when working on `scene.blend`.\n\nExport the whole scene to `/home/user/Desktop/output/scene.usda` as ASCII USD with the materials translated into USD `UsdPreviewSurface` shaders. ## Requirements 1. `/home/user/Desktop/output/scene.usda` exists and is readable. 2. The first line of the file starts with `#usda` (ASCII USD marker, not the binary `.usdc` header). 3. The file contains a `def Xform \"Cube_A\"` prim. 4. The file contains a `def Xform \"Cube_B\"` prim. 5. The file contains a `def Material \"Mat_A\"` block with a nested `def Shader \"...\"` definition. 6. The file contains a `def Material \"Mat_B\"` block with a nested `def Shader \"...\"` definition. 7. The token `info:id = \"UsdPreviewSurface\"` appears at least 2 times (once per material). 8. Inside the `Mat_A` block, `diffuseColor = (r, g, b)` has values close to (0.8, 0.2, 0.2) within +/- 0.05 per channel. 9. Inside the `Mat_B` block, `diffuseColor = (r, g, b)` has values close to (0.2, 0.8, 0.2) within +/- 0.05 per channel. 10. At least one `inputs:roughness = <float>` line is present (the scene's two Principled BSDF materials map their Roughness to this shader input).",
  "source": "https://docs.blender.org/manual/en/4.1/; https://docs.blender.org/api/4.1/; https://developer.blender.org/docs/release_notes/4.1/; https://openusd.org/release/index.html; https://www.loc.gov/preservation/digital/formats/fdd/fdd000507.shtml",
  "config": [
    {
      "type": "upload_file",
      "parameters": {
        "files": [
          {
            "local_path": "task-35/init_file/scene.blend",
            "path": "/home/user/Desktop/scene.blend"
          }
        ]
      }
    }
  ],
  "trajectory": "trajectories/",
  "related_apps": [
    "blender"
  ],
  "evaluator": {
    "postconfig": [
      {
        "type": "upload_file",
        "parameters": {
          "files": [
            {
              "local_path": "task-35/eval.py",
              "path": "/home/user/Desktop/eval.py"
            }
          ]
        }
      }
    ],
    "func": "exact_match",
    "result": {
      "type": "vm_command_line",
      "command": "python3 /home/user/Desktop/eval.py",
      "shell": "true"
    },
    "expected": {
      "type": "rule",
      "rules": {
        "expected": "True\n"
      }
    }
  },
  "proxy": false,
  "fixed_ip": false,
  "possibility_of_env_change": "low"
}