Blender Python Automation (bpy)

Prerequisites

• Blender must be installed and accessible from the CLI (blender --version).
• Scripts run via: blender --background --python
• For interactive use: connect via Blender's built-in Python console or the REST server addon.

Common Snippets

Create an object

import bpy
bpy.ops.mesh.primitive_cube_add(location=(0, 0, 0))
obj = bpy.context.object
obj.name = "MyCube"

Batch render all frames

import bpy
scene = bpy.context.scene
scene.render.filepath = "//renders/frame_"
bpy.ops.render.render(animation=True)

Apply a material by name

import bpy
mat = bpy.data.materials.get("MyMaterial")
if mat is None:
    mat = bpy.data.materials.new(name="MyMaterial")
obj = bpy.context.object
if obj.data.materials:
    obj.data.materials[0] = mat
else:
    obj.data.materials.append(mat)

Tips

• Always use --background when running headless (no UI).
• Use bpy.data (global access) vs bpy.context (active selection) correctly.
• For long renders, consider Cron jobs in OpenClaw so main chat isn't blocked.