Build 3D models in code

Two commands

Runs in Node. No modelling app, no DOM, nothing to log into. What comes out is a plain .glb, so it drops into Godot, Unity, Unreal or a web page the same as any other asset, and nothing from the kit ships with your game.

npm i antics-modelkit three
npx modelkit build models.mjs

A file that returns parts

One function per model, using the kit's own verbs. You don't implement these, they come with the package. Every part gets a name, so a page can open the lid, spin the wheel or light the sign without touching geometry.

import { box, sit } from "antics-modelkit";

export function crate(w = 0.6) {
  return { category: "prop", parts: [
    { name: "body", geometry: sit(box(w, w, w)), color: 0x8a6b45 },
  ] };
}

The checks are the point

A surface built inside out does not look wrong — it vanishes, and gets debugged as a lighting bug. The build refuses that, and refuses anything a glTF reader would reject, so what builds opens anywhere. Stray triangles it strips; holes you can see into it warns you about. It will also render the thing at play size and tell you when it is unreadable.

A pocket watch, from a photograph

Modelled from a single reference photo. The lid opens onto a movement that turns, and the recipe that generates it ships on the page — change the case size and build your own.

It already knows how

Point a coding agent at the docs and it can build, check and publish a model on its own. Our MCP server also lets it search the catalogue by part name — ask for something with a shutter and it finds the shophouse.

Read https://antics.gg/modelkit/llms.txt, then build me a 3D model with antics-modelkit and export it as a .glb

Type a prompt instead

Everything here assumes a coding agent at your side. The text-to-3D page walks that path with a starter prompt — and a hosted generator, where you type on this site and we run the agent, is on its way.

The source ships with it

The package carries its own source, unminified and commented — read it on npm without installing anything. MIT, so you can change it, build on it and use it commercially. The recipes on every model page are MIT too.