@json-render/react-three-fiber

React Three Fiber renderer for json-render. 19 built-in 3D components.

Two Entry Points

Usage Pattern

Pick the 3D components you need from the standard definitions:

import { defineCatalog } from "@json-render/core";
import { schema } from "@json-render/react/schema";
import { threeComponentDefinitions } from "@json-render/react-three-fiber/catalog";
import { defineRegistry } from "@json-render/react";
import { threeComponents, ThreeCanvas } from "@json-render/react-three-fiber";

// Catalog: pick definitions
const catalog = defineCatalog(schema, {
  components: {
    Box: threeComponentDefinitions.Box,
    Sphere: threeComponentDefinitions.Sphere,
    AmbientLight: threeComponentDefinitions.AmbientLight,
    DirectionalLight: threeComponentDefinitions.DirectionalLight,
    OrbitControls: threeComponentDefinitions.OrbitControls,
  },
  actions: {},
});

// Registry: pick matching implementations
const { registry } = defineRegistry(catalog, {
  components: {
    Box: threeComponents.Box,
    Sphere: threeComponents.Sphere,
    AmbientLight: threeComponents.AmbientLight,
    DirectionalLight: threeComponents.DirectionalLight,
    OrbitControls: threeComponents.OrbitControls,
  },
});

Rendering

ThreeCanvas (convenience wrapper)

<ThreeCanvas
  spec={spec}
  registry={registry}
  shadows
  camera={{ position: [5, 5, 5], fov: 50 }}
  style={{ width: "100%", height: "100vh" }}
/>

Manual Canvas setup

import { Canvas } from "@react-three/fiber";
import { ThreeRenderer } from "@json-render/react-three-fiber";

<Canvas shadows>
  <ThreeRenderer spec={spec} registry={registry}>
    {/* Additional R3F elements */}
  </ThreeRenderer>
</Canvas>

Available Components (19)

Primitives (7)

• Box -- width, height, depth, material
• Sphere -- radius, widthSegments, heightSegments, material
• Cylinder -- radiusTop, radiusBottom, height, material
• Cone -- radius, height, material
• Torus -- radius, tube, material
• Plane -- width, height, material
• Capsule -- radius, length, material

All primitives share: position, rotation, scale, castShadow, receiveShadow, material.

Lights (4)

• AmbientLight -- color, intensity
• DirectionalLight -- position, color, intensity, castShadow
• PointLight -- position, color, intensity, distance, decay
• SpotLight -- position, color, intensity, angle, penumbra

Other (8)

• Group -- container with position/rotation/scale, supports children
• Model -- GLTF/GLB loader via url prop
• Environment -- HDRI environment map (preset, background, blur, intensity)
• Fog -- linear fog (color, near, far)
• GridHelper -- reference grid (size, divisions, color)
• Text3D -- SDF text (text, fontSize, color, anchorX, anchorY)
• PerspectiveCamera -- camera (position, fov, near, far, makeDefault)
• OrbitControls -- orbit controls (enableDamping, enableZoom, autoRotate)

Shared Schemas

Reusable Zod schemas for custom 3D catalog definitions:

import { vector3Schema, materialSchema, transformProps, shadowProps } from "@json-render/react-three-fiber";
import { z } from "zod";

// Custom 3D component
const myComponentDef = {
  props: z.object({
    ...transformProps,
    ...shadowProps,
    material: materialSchema.nullable(),
    myCustomProp: z.string(),
  }),
  description: "My custom 3D component",
};

Material Schema

materialSchema = z.object({
  color: z.string().nullable(),         // default "#ffffff"
  metalness: z.number().nullable(),     // default 0
  roughness: z.number().nullable(),     // default 1
  emissive: z.string().nullable(),      // default "#000000"
  emissiveIntensity: z.number().nullable(), // default 1
  opacity: z.number().nullable(),       // default 1
  transparent: z.boolean().nullable(),  // default false
  wireframe: z.boolean().nullable(),    // default false
});

Spec Format

3D specs use the standard json-render flat element format:

{
  "root": "scene",
  "elements": {
    "scene": {
      "type": "Group",
      "props": { "position": [0, 0, 0] },
      "children": ["light", "box"]
    },
    "light": {
      "type": "AmbientLight",
      "props": { "intensity": 0.5 },
      "children": []
    },
    "box": {
      "type": 
how to use react-three-fiber
CursorClaude CodeClineCodexWindsurfGooseGitHub CopilotVS CodeGemini CLIKiloOpencodeKimi CLIRoo ClineAiderContinueZedBolt.newLovablev0Replit AgentSweepSmol DeveloperDevinCavemanAmpAntigravity
How to use react-three-fiber on Cursor
AI-first code editor with Composer
1
Prerequisites
Before installing skills in Cursor, ensure your development environment meets these requirements:
›Cursor installed and configured on your development machine
›Node.js version 16.0+ with npm package manager (verify with node --version)
›Active project directory or workspace where you want to add react-three-fiber
2
Execute installation command
Execute the skills CLI command in your project's root directory to begin installation:
$npx skills add https://github.com/vercel-labs/json-render --skill react-three-fibercopy
The skills CLI fetches react-three-fiber from GitHub repository vercel-labs/json-render and configures it for Cursor.
3
Select Cursor when prompted
The CLI will show a list of available agents. Use arrow keys to navigate and space to select Cursor:
◆ Which agents do you want to install to?
│
│ ── Universal (.agents/skills) ── always included ────
│   • Amp
│   • Antigravity
│   • Cline
│   • Codex
│ ●Cursor(selected)
│   • Cursor
│   • Windsurf
4
Verify installation
Confirm successful installation by checking the skill directory location:
.cursor/skills/react-three-fiber
Reload or restart Cursor to activate react-three-fiber. Access the skill through slash commands (e.g., /react-three-fiber) or your agent's skill management interface.
⚠
Security & Verification Notice
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
Skills execute code in your development environment. Always verify the publisher's identity, review recent commits, and test in isolated environments before production deployment.
Additional Resources
›View source code on GitHub›Skills CLI documentation›Learn more about Cursor›What are agent skills?