Render Window — hero
camera + framing set up by the AI contestant
3D Viewport — red-ball User Persp
LOADING 3D VIEW
$0.03Cost
42sDuration
7Tool calls
8Turns
Blender 5.1.0MCP 1.22026-07-15
Tokens: 43994/3244Vision: ✗Votes W-L-T: 0-0-0DONE ✓
B-BENCH — TRANSCRIPT OpenAI / GPT 5.6 Luna · r1 · 2026-07-15
RUN LOG — red-ball · OpenAI / GPT 5.6 Luna · r1 · ok
SYSTEM PROMPTthe control — every model on this task got these instructions
PROMPTblender-bench v6HARNESSraw-v1
SHOW FULL PROMPT · 1104 chars
You are participating in Blender-Bench, a public benchmark where AI models complete the same Blender task. Your result will be compared head-to-head with another model. Anyone on the internet can vote, based only on the published visual outputs they can inspect: the interactive 3D scene and rendered presentation. Complete the request as well as you can. The benchmark does not prescribe a workflow or visual style; use whichever Blender techniques you consider appropriate. Make the important requirements evident in the published result, save a complete scene, and present the work clearly in every requested output. ## Harness Instructions You are operating Blender through the provided tools. The scene starts empty. Build what the user's prompt asks for in the current scene. Work step by step and verify your own work. Before you finish, set up a camera and lighting to frame a single, well-composed presentation image of your result — position and aim the camera, and add or adjust lights so the subject reads clearly. When you are finished, reply with the single word DONE and no tool calls.
--TASK red-ball: ## Task
Complete the following Blender task:
<task>
A red sphere of 1 meter diameter resting on a white ground plane — touching it
exactly, neither floating nor sunk. Smooth shading, a plain red material on the
ball, plain white on the floor.
The floor is the sphere, the color, and the contact. The ceiling is presentation:
a soft believable shadow under the ball, a hint of glossiness that catc…
59:14>>execute_blender_code({"code":"import bpy, math\nfrom mathutils import Vector\n# clear\nbpy.ops.object.select_all(action='SELECT')\nbpy.ops.object.delete(use_global=False)\nfor datablocks in (bpy.data.meshes, bpy.data.curves, bpy.data.materials, bpy.data.cameras, bpy.data.lights):\n pass\n# materials\nred=bpy.data.materials.new('Plain Red Sphere')\nred.diffuse_color=(0.72,0.015,0.012,1)\nred.use_nodes=True\nbs=red.n…)
59:14<<Error executing code: Communication error with Blender: Code execution error: bpy_struct: item.attr = val: enum "BLENDER_EEVEE_NEXT" not found in ('BLENDER_EEVEE', 'BLENDER_WORKBENCH', 'CYCLES')
59:20>>execute_blender_code({"code":"import bpy\nfrom mathutils import Vector\n# use existing objects or rebuild safely\n# materials helper\nred=bpy.data.materials.get('Plain Red Sphere') or bpy.data.materials.new('Plain Red Sphere')\nred.use_nodes=True; bs=red.node_tree.nodes.get('Principled BSDF'); bs.inputs['Base Color'].default_value=(0.72,0.012,0.008,1); bs.inputs['Roughness'].default_value=0.24; bs.inputs['Specular'].d…)
59:20<<Error executing code: Communication error with Blender: Code execution error: 'bpy_prop_collection[key]: key "Specular" not found'
59:25>>execute_blender_code({"code":"import bpy\nfrom mathutils import Vector\nred=bpy.data.materials.get('Plain Red Sphere') or bpy.data.materials.new('Plain Red Sphere'); red.use_nodes=True\nbs=red.node_tree.nodes.get('Principled BSDF'); bs.inputs['Base Color'].default_value=(0.72,0.012,0.008,1); bs.inputs['Roughness'].default_value=0.24\nif 'Specular IOR Level' in bs.inputs: bs.inputs['Specular IOR Level'].default_value=0…)
59:25<<Error executing code: Communication error with Blender: Code execution error: Error: Cannot open file <repo>\apps\console\tmp\red_sphere_scene.blend@ for writing: No such file or directory
59:28>>execute_blender_code({"code":"import bpy\nbpy.ops.wm.save_as_mainfile(filepath='red_sphere_scene.blend')\nbpy.context.scene.render.filepath='red_sphere.png'\nbpy.ops.render.render(write_still=True)","user_prompt":"Save and render the completed red sphere presentation scene."})
59:28<<Error executing code: Communication error with Blender: Code execution error: Error: Render error (No error) cannot save: 'C:\red_sphere.png'
59:31>>execute_blender_code({"code":"import bpy\nsc=bpy.context.scene\nsc.render.filepath='red_sphere.png'\nbpy.ops.wm.save_as_mainfile(filepath='red_sphere_scene.blend')\nbpy.ops.render.render(write_still=True)","user_prompt":"Finalize and save the Blender scene with the rendered presentation."})
59:31<<Error executing code: Communication error with Blender: Code execution error: Error: Render error (No error) cannot save: 'C:\red_sphere.png'
59:36>>get_scene_info({"user_prompt":"Verify the completed Blender scene objects and camera."})
59:36<<{
"name": "Scene",
"object_count": 5,
"objects": [
{
"name": "Red Sphere \u2014 1m Diameter",
"type": "MESH",
"location": [
0.0,
0.0,
0.5
]
},
{
"name": "White Ground Plane",
"type": "MESH",
"location": [
0.0,
0.0,
0.0
]
},
{
"name": "Large Softbox Key",
"type": "LI…
59:39>>execute_blender_code({"code":"import bpy\nbpy.ops.wm.save_as_mainfile(filepath='red_sphere_scene.blend')","user_prompt":"Ensure the completed Blender scene is saved."})
59:39<<Code executed successfully: Info: Saved as "red_sphere_scene.blend"
59:41ai>DONE
59:41--status: ok · DONE declared
>
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