WebGPURenderer Integration with React-Three-Fiber

Based on the information available, I can provide some guidance on integrating WebGPURenderer with React-Three-Fiber, though I should note that the provided context doesn't specifically cover WebGPURenderer as it focuses on WebGLRenderer and WebXR-related renderers.

The approach you're taking - injecting a custom renderer into R3F - is conceptually correct. R3F is designed to be renderer-agnostic, so it should work with WebGPURenderer. However, there are several potential issues that could cause your blank screen:

Potential Issues

1. WebGPU Support: Make sure your browser supports WebGPU. Currently, it's only available in Chrome 113+ and other Chromium-based browsers with the appropriate flags enabled.

2. Async Initialization: WebGPURenderer requires async initialization, which might be causing timing issues with R3F's render loop.

3. R3F Version Compatibility: Ensure you're using a version of R3F that's compatible with the approach in the guide you're following.

Suggested Approach

Here's a modified approach you could try:

JSXCopied
import { Canvas, useThree } from '@react-three/fiber'
import { WebGPURenderer } from 'three/addons/renderers/WebGPURenderer.js'
import { useEffect, useState } from 'react'

// Custom component to handle WebGPU initialization
function WebGPUInit() {
  const { gl, set } = useThree()
  const [isInitialized, setIsInitialized] = useState(false)
  
  useEffect(() => {
    async function initWebGPU() {
      const webGPURenderer = new WebGPURenderer()
      await webGPURenderer.init()
      
      // Copy properties from the original renderer
      webGPURenderer.setSize(gl.domElement.width, gl.domElement.height)
      webGPURenderer.setPixelRatio(window.devicePixelRatio)
      
      // Replace the renderer in R3F
      set({ gl: webGPURenderer })
      setIsInitialized(true)
    }
    
    initWebGPU().catch(console.error)
  }, [gl, set])
  
  return isInitialized ? null : <mesh><boxGeometry /><meshBasicMaterial color="red" /></mesh>
}

// Main component
export default function App() {
  return (
    <Canvas>
      <WebGPUInit />
      {/* Your scene content */}
      <mesh>
        <boxGeometry />
        <meshStandardMaterial />
      </mesh>
      <ambientLight intensity={0.5} />
      <directionalLight position={[10, 10, 5]} />
    </Canvas>
  )
}

This approach:

1. Initializes R3F with the default renderer
2. Asynchronously initializes WebGPURenderer
3. Replaces the default renderer with WebGPURenderer once it's ready

If you're still experiencing issues, you might want to check if there are any specific requirements or configurations needed for WebGPURenderer that aren't covered in the guide you're following.

Unfortunately, the provided context doesn't include specific information about WebGPURenderer integration with React-Three-Fiber, so you might need to explore the Three.js examples or the R3F community for more targeted solutions.