Render Window — hero
camera + framing set up by the AI contestant
3D Viewport — red-ball User Persp
LOADING 3D VIEW
$0.20Cost
93sDuration
8Tool calls
9Turns
Blender 5.1.0MCP 1.22026-07-15
Tokens: 50023/3297Vision: ✓Votes W-L-T: 0-0-0DONE ✓
B-BENCH — TRANSCRIPT OpenAI / GPT 5.6 Sol · r1 · 2026-07-15
RUN LOG — red-ball · OpenAI / GPT 5.6 Sol · 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…
01:30>>execute_blender_code({"code":"import bpy, math\nfrom mathutils import Vector\n\n# Clear scene\nbpy.ops.object.select_all(action='SELECT')\nbpy.ops.object.delete(use_global=False)\nfor datablocks in (bpy.data.materials, bpy.data.cameras, bpy.data.lights):\n pass\n\n# Materials\nred = bpy.data.materials.new('Ball_Red')\nred.diffuse_color = (0.8, 0.012, 0.018, 1.0)\nred.use_nodes = True\npbs = red.node_tree.nodes.get(…)
01:30<<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')
01:39>>execute_blender_code({"code":"import bpy\nscene=bpy.context.scene\nscene.render.engine='BLENDER_EEVEE'\nscene.render.resolution_x=800\nscene.render.resolution_y=800\nscene.render.resolution_percentage=100\nscene.render.image_settings.file_format='PNG'\nscene.render.image_settings.color_mode='RGB'\nscene.render.film_transparent=False\nscene.render.filepath='/tmp/red_sphere_presentation.png'\n# Eevee quality and soft sh…)
01:39<<Error executing code: Communication error with Blender: Code execution error: 'SceneEEVEE' object has no attribute 'use_gtao'
01:45>>execute_blender_code({"code":"import bpy\nscene=bpy.context.scene\nscene.render.engine='BLENDER_EEVEE'\nscene.render.resolution_x=800; scene.render.resolution_y=800; scene.render.resolution_percentage=100\nscene.render.image_settings.file_format='PNG'; scene.render.image_settings.color_mode='RGB'\nscene.render.film_transparent=False; scene.render.filepath='/tmp/red_sphere_presentation.png'\n# Version-safe Eevee config…)
01:45<<Error executing code: Communication error with Blender: Code execution error: Error: Cannot open file <repo>\apps\console\tmp\red_sphere_ground.blend@ for writing: No such file or directory
01:51>>execute_blender_code({"code":"import bpy, tempfile, os\nscene=bpy.context.scene\noutdir=tempfile.gettempdir()\nscene.render.filepath=os.path.join(outdir,'red_sphere_presentation.png')\nblendpath=os.path.join(outdir,'red_sphere_ground.blend')\nbpy.ops.wm.save_as_mainfile(filepath=blendpath)\nbpy.ops.render.render(write_still=True)\nball=bpy.data.objects.get('Red Sphere — 1m Diameter'); plane=bpy.data.objects.get('White…)
01:52<<Code executed successfully: Info: Saved as "red_sphere_ground.blend"
saved <home>\AppData\Local\Temp\red_sphere_ground.blend render <home>\AppData\Local\Temp\red_sphere_presentation.png contact 0.0 0.0
01:54>>get_viewport_screenshot({"max_size":800,"user_prompt":"Verify the finished exact-contact red sphere studio scene and presentation."})
01:56<<
01:56imgimage delivered — get_viewport_screenshot
02:01>>execute_blender_code({"code":"import bpy\n# Show the completed Render Result in the largest UI area for visual verification\narea=max(bpy.context.screen.areas,key=lambda a:a.width*a.height)\narea.type='IMAGE_EDITOR'\narea.spaces.active.image=bpy.data.images.get('Render Result')\n","user_prompt":"Verify the final presentation render of the red sphere touching the white plane."})
02:02<<Code executed successfully:
02:07>>get_viewport_screenshot({"max_size":800,"user_prompt":"Inspect the final rendered presentation image."})
02:07<<Error executing tool get_viewport_screenshot: Screenshot failed: No 3D viewport found
02:19>>execute_blender_code({"code":"import bpy, tempfile, os\narea=max(bpy.context.screen.areas,key=lambda a:a.width*a.height)\narea.type='VIEW_3D'\nspace=area.spaces.active\nspace.region_3d.view_perspective='CAMERA'\nspace.shading.type='RENDERED'\n# Keep finished file current\nbpy.ops.wm.save_as_mainfile(filepath=os.path.join(tempfile.gettempdir(),'red_sphere_ground.blend'))\n","user_prompt":"Finalize and save the exact-co…)
02:19<<Code executed successfully: Info: Saved as "red_sphere_ground.blend"
02:21ai>DONE
02:21--status: ok · DONE declared
>
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