Show HN: MCP server for Blender that builds 3D scenes via natural language
blender-mcp-psi.vercel.appHi HN!
I built a custom MCP (Model Context Protocol) server that connects Blender to LLMs like ChatGPT, Claude, and any other llm supporting tool calling and mcps, enabling the AI to understand and control 3D scenes using natural language.
You can describe an entire environment like:
> “Create a small village with 5 huts arranged around a central bonfire, add a river flowing on the left, place a wooden bridge across it, and scatter trees randomly.”
And the system parses that, reasons about the scene, and builds it inside Blender — no manual modeling or scripting needed.
What it can do: - Generate multi-object scenes like villages, landscapes, from a single prompt - Understand spatial relations — e.g., “place the bridge over the river” or “add trees behind the huts” - Create camera animations and lighting setups: “orbit around the scene at sunset lighting” - Respond to iterative changes like: “replace all huts with stone houses” or “make the river narrower” - Maintain object hierarchy and labels for later editing
Tech Stack: - Blender Python scripting - Node.js server running MCP - LLM backend (OpenAI / Claude, easily swappable)
Demo: https://blender-mcp-psi.vercel.app/
GitHub: https://github.com/pranav-deshmukh/blender-mcp-demo/
Curious to hear thoughts from folks in 3D tooling, AI-assisted design, or dev interface design. Would you find this useful as a Blender plugin? I’m open to expanding it!
Please try it and give it a star on github
The fade in effect when scrolling down is quite distracting, and makes reading the web page slower, because I have to wait for the text to appear. Yes, I have a fast computer.
Hi, quick feedback: the demo is extremely short, so I can't really say much. Please generate more complicated scenes and, most importantly, inspect the wireframe. From what I could glance from the demo, the generated models are tri-based instead of quads, which would be a showstopper for me.
An MPC server is not necessary, one can just API call LLM services directly from within Blender, and they already know Blender - the LLMs know it very well, it being open source and a gargantuan amount of data about it online in the form of tutorials and so on - all in foundation model training data.
Nice idea - I’m adding it to my list over at https://taoofmac.com/space/ai/mcp and will try it out later as I have been dabbling in Blender plugins myself.
Does anyone know of a way to create custom 3D print designs with LLMs? Is there a bespoke project or service somewhere?
how does it compare to the existing https://blender-mcp.com/ ?
Slightly strange how both use the same example of a house with some trees.
Better in every way since this is posted to HN!