{
  "id": "single-software-execution--cli--blender--task-07--ubuntu",
  "snapshot": "Blender-4.2.3",
  "instruction": "Heightmap to Terrain Mesh `/home/user/Desktop/height.png` is a 64×64 8-bit grayscale PNG. `/home/user/Desktop/template.blend` is an empty scene. Launch Blender by running `blender` from a terminal. For this workflow, use `/opt/blender/blender` for Blender command-line or background runs when working on `template.blend`.\n\nBuild a heightmap terrain mesh from the PNG and save the result to `/home/user/Desktop/answer.blend`. ## Mesh definition - One vertex per pixel, so the mesh has 64×64 = 4096 vertices. - For pixel at column `x` and row `y` with 8-bit grayscale value `v ∈ [0, 255]`, the corresponding vertex in the object's local space is `(x, y, v / 255 * 0.5)`. (So Z = 0 at black, Z = 0.5 at white.) Columns correspond to PNG x, rows to PNG y. - Adjacent 2×2 pixel blocks form faces. That is, for every `0 ≤ x < 63` and `0 ≤ y < 63` there is a face whose corners are the four vertices at `(x,y)`, `(x+1,y)`, `(x+1,y+1)`, `(x,y+1)`. Faces may be kept as quads (3969 total) or triangulated (7938 total) — both are accepted. - The mesh object is named `Terrain`. Its object origin is at world `(0, 0, 0)` and it has no modifiers. - No other mesh objects may be present in the saved scene. ## Requirements 1. `/home/user/Desktop/answer.blend` exists and opens. 2. The scene contains exactly one mesh object, named `Terrain`, with an empty modifier stack. 3. `Terrain.location` equals `(0, 0, 0)` within 1e-5. 4. The mesh has exactly 4096 vertices. 5. The mesh has either 3969 polygons (quads) or 7938 polygons (triangulated). 6. In object space, the vertex X coordinates span `[0, 63]` and the Y coordinates span `[0, 63]`, each endpoint within 1e-3. 7. In object space, Z values are in `[0, 0.5]`, and `max(z)` is consistent with the PNG's maximum pixel value at scale 0.5 within 0.01. 8. For each of the pixel coordinates `(0,0)`, `(0,63)`, `(63,0)`, `(31,31)` there is a vertex at the expected `(x, y, v/255 * 0.5)` within 1e-2. How you produce `/home/user/Desktop/answer.blend` (Blender UI, a Python script, or otherwise) is up to you; only the final state matters.",
  "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://www.loc.gov/preservation/digital/formats/fdd/fdd000507.shtml",
  "config": [
    {
      "type": "upload_file",
      "parameters": {
        "files": [
          {
            "local_path": "task-07/init_file/height.png",
            "path": "/home/user/Desktop/height.png"
          }
        ]
      }
    },
    {
      "type": "upload_file",
      "parameters": {
        "files": [
          {
            "local_path": "task-07/init_file/template.blend",
            "path": "/home/user/Desktop/template.blend"
          }
        ]
      }
    }
  ],
  "trajectory": "trajectories/",
  "related_apps": [
    "blender"
  ],
  "artifact_paths": [
    "/home/user/Desktop/answer.blend"
  ],
  "evaluator": {
    "postconfig": [
      {
        "type": "upload_file",
        "parameters": {
          "files": [
            {
              "local_path": "task-07/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"
}