[HN Gopher] Show HN: MCP server for Blender that builds 3D scene...
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Show HN: MCP server for Blender that builds 3D scenes via natural
language
Hi 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
Author : prono
Score : 143 points
Date : 2025-07-20 06:01 UTC (16 hours ago)
(HTM) web link (blender-mcp-psi.vercel.app)
(TXT) w3m dump (blender-mcp-psi.vercel.app)
| homarp wrote:
| how does it compare to the existing https://blender-mcp.com/ ?
| N_Lens wrote:
| Better in every way since this is posted to HN!
| boguscoder wrote:
| That one was discussed here too, many times
| chmod775 wrote:
| Slightly strange how both use the same example of a house with
| some trees.
| prono wrote:
| Will use better example, thank you for suggestion
| deng wrote:
| 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.
| prono wrote:
| On it, thank you for feedback
| thegeomaster wrote:
| Just curious: why do you prefer/have a requirement of quad-
| based meshes?
| ddtaylor wrote:
| Sometimes texture artists like this a lot more.
| deng wrote:
| Because traditionally, Blender modeling works best on a clean
| quad-based mesh. Just look at any modeling tutorial for
| Blender and one of the first things you learn is to always
| keep a clean, quad-based topology, and avoid triangles and
| n-gons as much as possible, as it will make further work on
| the model more painful, if not impossible. That starts with
| simple stuff like doing a loop cut to things like uv-
| unwrapping and using the sculpting tools. It's also better
| for subdivision surface modeling. You can of course use tri-
| based models, but if you want to refine them manually, it's
| often a pain. Usually, for me it's pretty much a "take as-is
| or leave it" situation for tri-based meshes, and since I see
| these AI-created models more as a starting point rather than
| the finished product, having a clean quad-based topology
| would be very important for me.
| nextaccountic wrote:
| Is this true even if you do only or mostly sculpting?
| LtdJorge wrote:
| No. But for animation meshes, it's the norm to use only
| quads. Mainly because of topology/retopology issues.
| gorbachev wrote:
| 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.
| halflife wrote:
| It is also very choppy on my iPhone 16, not sure why.
|
| Edit - I tried watching the demo, and it seems that on my phone
| the site is not usable, I can't play the video, clicking on
| play does nothing and the page keeps scrolling and jumping
| desdenova wrote:
| The site layout is completely broken.
|
| Probably vibecoded slop.
| prono wrote:
| Hi, not at all vibecoded. I will fix it asap, I built it in
| hurry, sorry for the issue
| brookst wrote:
| That's fairly rude.
| llbbdd wrote:
| HN has been happily very rude about anything AI related
| the last year, even in cases here where it's hardly
| relevant or appropriate. It's depressing and I used to
| expect a lot better.
| hombre_fatal wrote:
| It takes more work to build a janky site than just no
| frills html/css unless you vibecoded it or copy and
| pasted a crappy template.
|
| I think we should be allowed to push back against sloppy
| work (which is different from beginner work) instead of
| ingratiating it with a smile.
|
| We have the rest of you to baby them over adding the
| worst css transitions I've ever seen, something they
| deliberately swerved into.
|
| They are accused of vibe coding it only through charity
| because it's hard to imagine they did it themselves and
| went "yup that's exactly what I wanted after spending
| that extra time adding it." Whether it's vibe coded or
| not isn't really the point.
| llbbdd wrote:
| Grading on perceived effort is not a rubric destined to
| last. You cannot detect sloppy work from beginner work
| without context, and in any case a lot of beginner work
| these days (and to some degree for the rest of time!) is
| going to include LLMs or AI.
|
| Is HN only for advertising startups these days? If this
| post had nothing to do with AI maybe the response would
| have included some real genuine criticism and feedback,
| with the assumption baked-in that a beginner was being
| coached.
|
| To your last point, then downvote it if it's bad. You're
| right and I agree precisely that it being vibe-coded
| wasn't the point - but it was brought up regardless. If
| the result is bad the feedback is still the same. If the
| "problem" is just that they used tools you don't agree
| with using, then that's not feedback on the result.
| prono wrote:
| Fixing it asap
| hgomersall wrote:
| The live demo video is broken in mobile Firefox. It
| displays, but is annoyingly cropped (and differently
| depending on landscape or portrait).
| johnisgood wrote:
| I do not think it has much to do with how fast your computer
| is, it is probably timed, e.g. from the CSS: "transition-
| duration: 0.3s". It is quite annoying.
|
| Almost akin to:
|
| - "How many CSS effects do you want?"
|
| - "Yes".
|
| :P
|
| At any rate, the project is pretty cool. Everything is just one
| prompt away now (not really, but still!).
| prono wrote:
| Thanks for the feedback brother, I will surely improve the
| website
| johnisgood wrote:
| The only issue I have is not being able to read the text
| right away, but perhaps making the animation faster might
| work?
| tacker2000 wrote:
| Why these web page animations are still a thing in 2025, i will
| never understand...
| bsenftner wrote:
| 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.
| redrove wrote:
| Does anyone know of a way to create custom 3D print designs with
| LLMs? Is there a bespoke project or service somewhere?
| r2_pilot wrote:
| I have successfully(if inefficiently, but faster than if I did
| it on my own) used Claude with OpenSCAD to make 3d printed
| products.
| rcarmo wrote:
| 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.
| prono wrote:
| Thanks
| mattigames wrote:
| I'm tired of the half-way-there automations, I want an MCP that
| can replace the _person_ that would need to use this.
| prono wrote:
| Ha ha, will reach there eventually
| bravesoul2 wrote:
| Taken to the nth degree you want an MCP server that makes you a
| feature length animation or invents a new device and ships it
| to you?
| mattigames wrote:
| Of course not, I would just ask for a MCP that watches the
| generated movie so I can use my time for more important
| matters, I just want the system to work by itself entirely,
| we could have these full consumerism silos and we just enjoy
| being called it's gods, but perhaps we could automate such
| egocentrism too.
| r2_pilot wrote:
| > Of course not, I would just ask for a MCP that watches
| the generated movie so I can use my time for more important
| matters
|
| Well, now I know why "they" bother to digitally simulate my
| existence, and why movies are so terrible.
| willsmith72 wrote:
| sounds like my CEO. "we don't need engineers, we have ai"
|
| now who runs the AI?
|
| ...
| franze wrote:
| Screenshots would be nice.
| contingencies wrote:
| I managed to do something like this directly in WebGL via threejs
| in Windsurf 2 weeks ago, you can see the resulting animation over
| here: https://infinite-food.com/ Also did an SVG animation and a
| globe with geopoints. So much easier than by hand...
| abrookewood wrote:
| Congrats and releasing something. I'm not a blender user, but I
| think the demo is pretty cool. Kind of crazy what MCP is allowing
| LLMs to do.
| fode wrote:
| This is an awesome use of MCP. Thank you!
| prono wrote:
| Thanks a lot brother
| zakki wrote:
| Great works. In your "How to Setup" the cloned project is
| "blender-mcp" but the directory is "bleder-mcp-demo".
|
| I don't have Claude and no experience with MCP. How to use it
| with other tools such as LMStudio, ollama, etc?
| prono wrote:
| fixing it, its actually blender-mcp only, I changed the repo
| name form blende-mcp-demo to blender-mcp.
|
| And you can use free tier claude desktop or other open source
| llms
| prono wrote:
| Updated github link: https://github.com/pranav-deshmukh/blender-
| mcp
| ur-whale wrote:
| Is there a feedback loop ?
|
| As in:
|
| External Prompt -> Claude -> MCP -> Blender -> Cycles -> .exr ->
| show Claude how good its work actually is -> Correct -> New
| prompt -> ... Rinse and repeat until result actually looks
| realistic.
| qarthandyc wrote:
| The fade-in effect is really distracting, and so poorly done. It
| takes the elements reaching almost 50% of the screen height
| before becoming readable.
|
| This is so sad to see animation hurting a good product.
| rsp1984 wrote:
| I apologize for this extremely dumb question, but how is this a
| "server"? As far as I'm aware Blender is a local app. It can run
| without an internet connection. If an LLM wants to call into it,
| it needs to call its local python API.
|
| Is this just unlucky naming or am I missing a critical piece?
| tracerbulletx wrote:
| MCP is a spec that is attempting to standardize a communication
| pattern for registering and calling tools from an llm. Part of
| the spec is a server that exposes specific JSON-RPC end points
| with a registry of the available tools, resources, and
| templates, and a way of executing them. That's the server, in
| this case the server acts as the interface into Blender.
| ww520 wrote:
| The pipeline for LLM to MCP and to the app looks like,
| LLM -> chat app -> MCP client -> MCP server -> specific app
| (Blender)
|
| The chat app doesn't know how to talk to Blender. It knows
| about MCP and links in a client. Blender exposes its
| functionality via a MCP server. MCP connects the two.
| camdenreslink wrote:
| A server-client architecture can run on a single computer. You
| just need one piece of code to act as the "server" and one to
| act as the "client". Technically you don't even necessarily
| have to involve the networking stack, you can just communicate
| between processes.
| WhatIsDukkha wrote:
| There is no real code here, its all a stub.
|
| No prompts, no functions, nothing in the github repos.
|
| https://github.com/pranav-deshmukh/blender-mcp/blob/main/add...
| vunderba wrote:
| Couple things:
|
| 1. Your github doesn't have anything in it, it is just a generic
| MCP server.
|
| 2. How does this differ from blender-mcp released by ahujasid
| several months ago? That one actually does have the complete
| source and has quite a following.
|
| https://github.com/ahujasid/blender-mcp
|
| https://news.ycombinator.com/item?id=43357112
| prono wrote:
| It is indeed a mcp server, but I have added some things that
| makes of different from being generic, it works smoothly, you
| can see from code.
|
| And I am working on it, it is new and I am adding other this to
| it like generating 3js scenes, adding free blender asset apis,
| etc. Happy if anyone else wants to contribute
| koolala wrote:
| Why star it on github if it doesn't include the code to run
| it?
| keysdev wrote:
| Cause github has become a advertising platform for dev. How
| did this get to front page without code?
| dcreater wrote:
| Your vibe coded website has a lot of issues on mobile
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(page generated 2025-07-20 23:01 UTC)