Blender Optics Simulator MCP Server

What the code does

We read the source, 9 h ago · rules 3dff92dd89df

A value the model can set ends up inside a file or shell call. That is not a flaw by itself — for a terminal server it is the job — but it is where things go wrong when it is not.

            subprocess.Popen([bpy.app.binary_path, path], close_fds=True)

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

        __import__(name)

            subprocess.Popen([bpy.app.binary_path, path], close_fds=True)

    zip_path = os.path.join(ROOT, "dist", zip_name)

        post_top=p.z-drop
        if bottom-4>post_top:
            G._cyl(prefix+'PlatformStem_'+tag,4,bottom-4-post_top,(p.x,p.y,(bottom-4+post_top)/2),coll,'steel')

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add blender-optics-simulator -- uvx blender-optics-mcp

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

[mcp_servers.blender-optics-simulator]
command = "uvx"
args = ["blender-optics-mcp"]

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

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

This one needs environment variables set before it will start: OPTICS_BRIDGE_PORT (TCP port of the add-on's localhost bridge inside Blender (Optics > Simulation > Start MCP Bridge).), OPTICS_BRIDGE_HOST (Host of the add-on bridge.). The author declared them in the registry entry; get the values from the project itself.