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"id": "single-software-execution--cli--blender--task-34--ubuntu",
"snapshot": "Blender-4.2.3",
"instruction": "glTF 2.0 roundtrip with PBR materials `/home/user/Desktop/ch.blend` contains a simple character scene: three mesh objects (`Body`, `Head`, `Arms`) each with its own Principled BSDF material. Launch Blender by running `blender` from a terminal. For this task, use `/opt/blender/blender` for Blender command-line or background runs when working on `ch.blend`.\n\nThe scene also has a camera and a point light. Export the whole scene to binary glTF 2.0 (GLB) at `/home/user/Desktop/output/character.glb`, then re-import that GLB into a fresh Blender scene and save the result as `/home/user/Desktop/output/verify.blend`. Both output files must be produced. ## Requirements 1. `/home/user/Desktop/answer.blend` exists and opens in Blender. 2. `answer.blend` (the original scene) has the three expected Principled BSDF materials (`Mat_Body`, `Mat_Head`, `Mat_Arms`) with Base Colors (0.2, 0.3, 0.6) / (0.85, 0.7, 0.6) / (0.2, 0.3, 0.6) respectively (tolerance 0.05 per channel). 3. `/home/user/Desktop/output/character.glb` exists and is readable. 4. The GLB has a valid header: first 4 bytes = `b'glTF'`, version (LE uint32) = 2, length (LE uint32) equals the file size, and the first chunk is a JSON chunk followed optionally by a BIN chunk. 5. The JSON chunk parses as a glTF document with a `materials` array containing at least three entries, including entries named `Mat_Body`, `Mat_Head`, `Mat_Arms`. 6. For each of those three materials, `pbrMetallicRoughness.baseColorFactor` (RGB) matches the original Principled BSDF Base Color within 0.05 per channel. 7. `/home/user/Desktop/output/verify.blend` exists and opens in Blender. 8. The re-imported `verify.blend` contains at least three materials with a Principled BSDF node whose Base Color matches each of the three expected values within 0.05 per channel (material name may be a substring match to allow for importer-added `.001` suffixes).",
"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://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html; https://www.loc.gov/preservation/digital/formats/fdd/fdd000507.shtml",
"config": [
{
"type": "upload_file",
"parameters": {
"files": [
{
"local_path": "task-34/init_file/ch.blend",
"path": "/home/user/Desktop/ch.blend"
}
]
}
}
],
"trajectory": "trajectories/",
"related_apps": [
"blender"
],
"artifact_paths": [
"/home/user/Desktop/answer.blend",
"/home/user/Desktop/output/character.glb",
"/home/user/Desktop/output/verify.blend"
],
"evaluator": {
"postconfig": [
{
"type": "upload_file",
"parameters": {
"files": [
{
"local_path": "task-34/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"
}
|