# React Three Fiber Ray Marching V0 Template: GLSL Shaders Without the Boilerplate

- Tool: V0 Templates
- Last updated: July 2026

## TL;DR

This template renders GPU-driven volumetric 3D effects in a Next.js hero section using React Three Fiber and a custom GLSL ray marching shader — no raw WebGL setup required. Fork it, tweak the signed distance function via a chat prompt, and deploy to Vercel where three.js loads from a proper npm bundle. The prompt pack covers SDF shapes, depth color grading, mouse parallax, and a Supabase per-tenant shader config. Genuinely Advanced: expect WebGL troubleshooting, not drag-and-drop.

## Frequently asked questions

### Is this React Three Fiber Ray Marching template free?

Yes. The template is free to fork from v0.dev's community page. React Three Fiber, Three.js, and @react-three/drei are all MIT-licensed. Vercel Hobby tier deployment is also free.

### Can I use this template in a commercial project?

Yes. All dependencies are MIT-licensed and V0 community templates carry no commercial use restrictions. You can ship this in a client site, SaaS product, or agency portfolio.

### Why does my fork show a blank canvas in the V0 preview?

V0's preview sandbox uses esm.sh to resolve modules, and three.js is too large for reliable loading in that environment. This is a known V0 sandbox limitation. Click 'Publish to Production' — the deployed Vercel app loads three.js from an npm bundle and the 3D effect will render correctly.

### Why does the 3D effect not work on my phone?

Ray marching shaders require many GPU floating-point operations per pixel and a high iteration count that exceeds the capability of most mobile GPUs. Add a device capability check using renderer.capabilities.maxFragmentUniforms and fall back to a static CSS gradient on mobile — the prompt pack includes an exact prompt for this.

### How do I change the 3D shape in the shader?

Use the 'Change the SDF scene to a torus knot shape' prompt from the pack above. The SDF (signed distance function) inside the GLSL fragment shader defines what 3D geometry is rendered. V0 can swap in common SDF primitives like spheres, boxes, tori, and torus knots on request.

### My build fails with 'Module not found: @react-three/fiber' — how do I fix it?

V0 sometimes omits three.js from package.json explicit dependencies even though it's a required peer dependency. In the V0 chat, send: 'Add three, @react-three/fiber, and @react-three/drei as explicit dependencies in package.json'. Then republish.

### Can RapidDev help integrate this into a full marketing site with a mobile fallback?

Yes. RapidDev can take the forked ray marching template and build it into a production Next.js page with a mobile CSS fallback, performance-tested 3D canvas, and Vercel Edge caching for fast initial loads.

### How do I debug GLSL shader errors — the page is just blank?

Open browser DevTools on the deployed Vercel URL and check the Console tab — WebGL shader compile errors appear there, not in the V0 editor or Vercel build logs. Alternatively, use the fix prompt from the gotchas section to add an onError overlay that surfaces GLSL errors directly on the page.

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Source: https://www.rapidevelopers.com/v0-template/react-three-fiber-ray-marching
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