b-open-io/threejs-r3f

Three.js / React Three Fiber

Guide for building 3D web experiences with R3F v9 (React 19) and the pmndrs ecosystem.

Version Constraints

| Package | Version | React | |---------|---------|-------| | @react-three/fiber | v9.x | 19.x | | @react-three/drei | v9.x+ | 19.x | | @react-three/rapier | v2.x | 19.x | | three | r171+ | — |

Use fiber v8 + rapier v1 for React 18 projects. Never mix version lines.

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Installation

Standalone Vite + R3F app

bun create vite my-scene -- --template react-ts
cd my-scene
bun add three @react-three/fiber @react-three/drei
bun add -d @types/three
bun dev

Into an existing React 19 project

bun add three @react-three/fiber @react-three/drei
bun add -d @types/three

Optional packages: bun add @react-three/rapier (physics), bun add zustand (state), bun add leva (debug GUI).

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Scene Setup

For the minimal scene template, Canvas prop table, frameloop values, responsive canvas, and WebGPU renderer bootstrap, read references/scene-setup.md.

Key facts to keep in mind without reading the reference:

• Canvas defaults: antialias: true, outputColorSpace = SRGBColorSpace, toneMapping = ACESFilmicToneMapping, ColorManagement.enabled = true
• Always set dpr={[1, 2]} to clamp device pixel ratio
• Use shadows="soft" for shadow maps; add castShadow/receiveShadow to meshes
• frameloop="demand" for static scenes that only need to re-render on interaction

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Drei Helpers — Top 15

All import from @react-three/drei. Read references/drei-helpers.md for full inventory, props, and examples.

Controls

• OrbitControls — rotate/zoom/pan; add makeDefault to expose via useThree
• ScrollControls — scroll-driven scenes; pair with useScroll inside useFrame
• PresentationControls — spring-animated drag; no OrbitControls needed
• KeyboardControls — typed key state context; read imperatively via get() in useFrame

Staging

• Environment — IBL from preset ('sunset' | 'warehouse' | 'city' | ...) or custom HDR
• Stage — one-component scene staging: lighting, camera fit, shadows
• ContactShadows — fake soft shadow on a plane; cheaper than shadow maps
• Float — floating/bobbing idle animation for hero objects

Shapes / Content

• Text — SDF 3D text with font loading, line wrapping, outlines
• Html — embed DOM content in 3D; supports occlude and transform

Loaders

• useGLTF — load and cache GLTF/GLB; auto-configures Draco CDN decoder
• useTexture — load and cache textures; object form for PBR maps

Performance

• Instances / Instance — instanced meshes with simple component API
• Detailed — LOD: show different meshes by camera distance
• PerformanceMonitor — FPS callbacks; pair with AdaptiveDpr

Materials

• MeshTransmissionMaterial — physically-based glass with refraction and chromatic aberration

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Asset Pipeline

GLTF Loading

import { useGLTF } from '@react-three/drei'
import { Suspense } from 'react'

function Model(props) {
  const { nodes, materials } = useGLTF('/model.glb')
  return (
    <group {...props} dispose={null}>
      <mesh geometry={nodes.Body.geometry} material={materials.Metal} castShadow />
    </group>
  )
}

useGLTF.preload('/model.glb')

// Wrap in Suspense
<Canvas>
  <Suspense fallback={null}>
    <Model />
  </Suspense>
</Canvas>

gltfjsx CLI

# Generate TypeScript component + Draco-compress the GLB
npx gltfjsx model.glb --transform --types --shadows
# Outputs: model-transformed.glb (move to /public) + Model.tsx (move to /src/components)

--transform shrinks most models 70–90% via Draco geometry compression, 1024px texture resize, and WebP conversion.

For clone pattern, KTX2 textures, lazy loading, and parallel preloading, read references/r3f-patterns.md.

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Performance Rules

Draw call budgets:

• Mobile: < 100 draw calls
• Desktop: < 300 draw calls

The 7 anti-patterns — never do these:

1. Never setState inside useFrame — mutate refs directly
2. Always use delta for animation — never fixed increments
3. Never setState in onPointerMove — mutate refs directly
4. Never read reactive store state in useFrame — use store.getState() imperative form
5. Never conditionally mount/unmount in render loop — use visible prop instead
6. Never create new THREE.Vector3() inside useFrame — allocate outside, reuse with .set()
7. Never create duplicate geometries/materials for identical meshes — share via useMemo or Instances

Disposal: Always call geometry.dispose() and material.dispose() in useEffect cleanup for dynamically created Three.js objects.

Read references/performance.md for all 7 anti-patterns with wrong/correct code pairs, texture optimization, frustum culling, stats tooling, and mobile rules.

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State, Physics, Debug GUI, and WebGPU

For these topics, read references/extras.md:

• Zustand imperative pattern (required for useFrame correctness)
• Leva debug GUI setup
• Rapier physics quick start
• WebGPU renderer bootstrap

For the full Rapier v2 API (all collider types, collision events, sensors, joints, forces, InstancedRigidBodies), read references/physics.md.

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Reference Files

• references/scene-setup.md — Minimal scene template, Canvas defaults, frameloop, responsive canvas, WebGPU renderer
• references/r3f-patterns.md — Canvas props, useFrame, useThree, event system, scroll-driven scenes, GLTF clone pattern, KTX2, lazy loading
• references/drei-helpers.md — Full Drei inventory by category: every helper with import, key props, and example
• references/performance.md — All 7 anti-patterns with wrong/correct code, instancing, LOD, texture compression, disposal checklist, mobile rules
• references/physics.md — Full Rapier v2: colliders, collision events, sensors, 6 joints, forces/impulses, InstancedRigidBodies
• references/extras.md — Zustand imperative pattern, Leva debug GUI, Rapier quick start, WebGPU bootstrap