blender-mcp

BlenderMCP - Blender Model Context Protocol Integration

What is BlenderMCP?

BlenderMCP is a powerful integration that bridges Blender, a professional 3D creation suite, with Claude AI via the Model Context Protocol (MCP). This allows Claude AI to directly interact with and control Blender, opening up possibilities for AI-assisted 3D modeling, scene creation, and complex manipulations.

How to Use BlenderMCP?

1. Install Prerequisites: Ensure you have Blender 3.0+ and Python 3.10+ installed. Install the uv package manager.
2. Integrate with Claude:
   • Claude for Desktop: Update your claude_desktop_config.json to include the blender-mcp server configuration.
   • Cursor: Configure MCP settings in Cursor, either globally or per project, by adding the blender-mcp server details.
3. Install Blender Addon: Download the addon.py file from the repository, open Blender, go to Edit > Preferences > Add-ons, click Install..., select the file, and enable the "Blender MCP" addon.
4. Start Connection: In Blender, open the sidebar (press 'N'), find the "BlenderMCP" tab, optionally enable Poly Haven assets, and click "Connect to Claude". Ensure the MCP server is running in your terminal.
5. Interact with Claude: Once connected, you'll see a hammer icon in Claude. Use natural language prompts to instruct Claude to perform actions in Blender.

Key Features of BlenderMCP

• Two-way Communication: Establishes a connection between Claude AI and Blender using a socket-based server.
• Object Manipulation: Create, modify, and delete 3D objects within Blender.
• Material Control: Apply and adjust materials and colors for objects.
• Scene Inspection: Retrieve detailed information about the current state of the Blender scene.
• Code Execution: Run arbitrary Python code within Blender directly from Claude.
• Asset Integration: Supports fetching assets from Poly Haven and generating 3D models via Hyper3D Rodin.
• Viewport Screenshots: View screenshots of the Blender viewport within Claude for better scene understanding.

Use Cases of BlenderMCP

• Prompt-Assisted Modeling: Describe a scene or object, and have Claude generate it in Blender.
• AI-Driven Scene Creation: Create complex scenes with specific moods or themes (e.g., "Create a beach vibe using HDRIs, textures, and models from Poly Haven").
• Rapid Prototyping: Quickly iterate on 3D designs by describing changes to Claude.
• Automated Asset Fetching: Instruct Claude to find and import models, textures, or HDRIs from sources like Poly Haven.
• Procedural Generation: Generate 3D models using AI services like Hyper3D Rodin.
• Scene Modification: Make specific changes like "Make this car red and metallic" or "Make the lighting like a studio".

FAQ for BlenderMCP

• Connection Issues:
  • Ensure the Blender addon server is running and the MCP server is correctly configured in Claude/Cursor.
  • Do not run the uvx command directly in the terminal unless instructed for setup.
  • Try restarting both Claude and the Blender server.
• Timeout Errors: Simplify your requests or break down complex operations into smaller, sequential steps.
• Poly Haven Integration: Claude's behavior with external APIs can sometimes be erratic; ensure your requests are clear.
• Running Multiple MCP Servers: Only run one MCP server instance at a time (either on Claude Desktop or Cursor).
• Security: The ability to execute arbitrary Python code is powerful but carries risks. Always save your Blender work before executing commands, especially in production environments.

Technical Details

• Communication Protocol: Uses a JSON-based protocol over TCP sockets. Commands are JSON objects with type and params, and responses contain status and result/message.
• Components: Consists of a Blender Addon (addon.py) acting as a socket server and an MCP Server (src/blender_mcp/server.py) implementing the protocol.
• Installation: Requires uv package manager for installation and setup.

Contributing & Disclaimer

Contributions are welcome via Pull Requests. This project is a third-party integration and is not officially affiliated with Blender.

BlenderMCP - Blender Model Context Protocol Integration

BlenderMCP connects Blender to Claude AI through the Model Context Protocol (MCP), allowing Claude to directly interact with and control Blender. This integration enables prompt assisted 3D modeling, scene creation, and manipulation.

Full tutorial

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Release notes (1.2.0)

• View screenshots for Blender viewport to better understand the scene
• Search and download Sketchfab models

Previously added features:

• Support for Poly Haven assets through their API
• Support to generate 3D models using Hyper3D Rodin
• For newcomers, you can go straight to Installation. For existing users, see the points below
• Download the latest addon.py file and replace the older one, then add it to Blender
• Delete the MCP server from Claude and add it back again, and you should be good to go!

Features

• Two-way communication: Connect Claude AI to Blender through a socket-based server
• Object manipulation: Create, modify, and delete 3D objects in Blender
• Material control: Apply and modify materials and colors
• Scene inspection: Get detailed information about the current Blender scene
• Code execution: Run arbitrary Python code in Blender from Claude

Components

The system consists of two main components:

1. Blender Addon (addon.py): A Blender addon that creates a socket server within Blender to receive and execute commands
2. MCP Server (src/blender_mcp/server.py): A Python server that implements the Model Context Protocol and connects to the Blender addon

Installation

Prerequisites

• Blender 3.0 or newer
• Python 3.10 or newer
• uv package manager:

If you're on Mac, please install uv as

brew install uv

On Windows

powershell -c "irm https://astral.sh/uv/install.ps1 | iex" 

and then

set Path=C:\Users\nntra\.local\bin;%Path%

Otherwise installation instructions are on their website: Install uv

⚠️ Do not proceed before installing UV

Claude for Desktop Integration

Watch the setup instruction video (Assuming you have already installed uv)

Go to Claude > Settings > Developer > Edit Config > claude_desktop_config.json to include the following:

{
    "mcpServers": {
        "blender": {
            "command": "uvx",
            "args": [
                "blender-mcp"
            ]
        }
    }
}

Cursor integration

For Mac users, go to Settings > MCP and paste the following

• To use as a global server, use "add new global MCP server" button and paste
• To use as a project specific server, create .cursor/mcp.json in the root of the project and paste

{
    "mcpServers": {
        "blender": {
            "command": "uvx",
            "args": [
                "blender-mcp"
            ]
        }
    }
}

For Windows users, go to Settings > MCP > Add Server, add a new server with the following settings:

{
    "mcpServers": {
        "blender": {
            "command": "cmd",
            "args": [
                "/c",
                "uvx",
                "blender-mcp"
            ]
        }
    }
}

Cursor setup video

⚠️ Only run one instance of the MCP server (either on Cursor or Claude Desktop), not both

Installing the Blender Addon

1. Download the addon.py file from this repo
2. Open Blender
3. Go to Edit > Preferences > Add-ons
4. Click "Install..." and select the addon.py file
5. Enable the addon by checking the box next to "Interface: Blender MCP"

Usage

Starting the Connection

1. In Blender, go to the 3D View sidebar (press N if not visible)
2. Find the "BlenderMCP" tab
3. Turn on the Poly Haven checkbox if you want assets from their API (optional)
4. Click "Connect to Claude"
5. Make sure the MCP server is running in your terminal

Using with Claude

Once the config file has been set on Claude, and the addon is running on Blender, you will see a hammer icon with tools for the Blender MCP.

Capabilities

• Get scene and object information
• Create, delete and modify shapes
• Apply or create materials for objects
• Execute any Python code in Blender
• Download the right models, assets and HDRIs through Poly Haven
• AI generated 3D models through Hyper3D Rodin

Example Commands

Here are some examples of what you can ask Claude to do:

• "Create a low poly scene in a dungeon, with a dragon guarding a pot of gold" Demo
• "Create a beach vibe using HDRIs, textures, and models like rocks and vegetation from Poly Haven" Demo
• Give a reference image, and create a Blender scene out of it Demo
• "Generate a 3D model of a garden gnome through Hyper3D"
• "Get information about the current scene, and make a threejs sketch from it" Demo
• "Make this car red and metallic"
• "Create a sphere and place it above the cube"
• "Make the lighting like a studio"
• "Point the camera at the scene, and make it isometric"

Hyper3D integration

Hyper3D's free trial key allows you to generate a limited number of models per day. If the daily limit is reached, you can wait for the next day's reset or obtain your own key from hyper3d.ai and fal.ai.

Troubleshooting

• Connection issues: Make sure the Blender addon server is running, and the MCP server is configured on Claude, DO NOT run the uvx command in the terminal. Sometimes, the first command won't go through but after that it starts working.
• Timeout errors: Try simplifying your requests or breaking them into smaller steps
• Poly Haven integration: Claude is sometimes erratic with its behaviour
• Have you tried turning it off and on again?: If you're still having connection errors, try restarting both Claude and the Blender server

Technical Details

Communication Protocol

The system uses a simple JSON-based protocol over TCP sockets:

• Commands are sent as JSON objects with a type and optional params
• Responses are JSON objects with a status and result or message

Limitations & Security Considerations

• The execute_blender_code tool allows running arbitrary Python code in Blender, which can be powerful but potentially dangerous. Use with caution in production environments. ALWAYS save your work before using it.
• Poly Haven requires downloading models, textures, and HDRI images. If you do not want to use it, please turn it off in the checkbox in Blender.
• Complex operations might need to be broken down into smaller steps

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Disclaimer

This is a third-party integration and not made by Blender. Made by Siddharth