Building Interactive 3D Backgrounds

The Gap

Three.js gives you total control over 3D scenes — meshes, materials, lights, cameras. But that power comes with an imperative API: create objects, attach them, call methods. It works, but it doesn't feel like React.

React Three Fiber (R3F) changes the equation. It wraps Three.js in a declarative React renderer, letting you compose 3D scenes with JSX.

A Simple Scene

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

function Scene() {
  return (
    <Canvas>
      <ambientLight intensity={0.4} />
      <mesh rotation={[-Math.PI / 2, 0, 0]}>
        <planeGeometry args={[10, 10, 128, 128]} />
        <meshStandardMaterial color="#1a3a5c" />
      </mesh>
    </Canvas>
  );
}

Custom Shaders in R3F

The real magic happens when you combine R3F with custom GLSL shaders. Using shaderMaterial from @react-three/drei, you can inject your own vertex and fragment shaders:

const WaterMaterial = shaderMaterial(
  { uTime: 0, uColor: new THREE.Color("#4facfe") },
  `/* vertex shader with wave displacement */`,
  `/* fragment shader with depth-based coloring */`
);

Performance That Doesn't Hurt

Because R3F uses React's reconciliation, it efficiently updates only what changed. You get:

• Automatic disposal of Three.js resources on unmount
• Pointer events that work with your 3D objects
• Seamless integration with the rest of your React app

For creative developers who want 3D that plays nicely with their component architecture, R3F is the bridge that makes it possible.