Raymarched Mandelbulb fractal with audio-reactive particles in Three.js

A compact Three.js/GLSL prompt asking Gemini 3 Pro to create a raymarched Mandelbulb fractal surrounded by thousands of audio-reactive instanced particles with Unreal Bloom, all in a single file.

Prompt by @SRKDANView the original post ↗Published 2025-11-19CC BY 4.0

The prompt

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Edit any of these and the prompt below updates. Copy gives you the filled-in version.

Create a raymarching Mandelbulb fractal in GLSL, surround it with 12,000 instanced particles, make it audio-reactive to my microphone, and add Unreal Bloom.

Generate opens this prompt in the editor, ready to run.

Model
Gemini 3
Media
Image
Language
English
Words
25

How to use this prompt

  1. 1Copy the prompt — fill in any placeholders first and the copy takes your version.
  2. 2Paste it into your image model, or press Generate to open it here with your own photo.
  3. 3Run it twice. Generation is not deterministic and the second pass is often the keeper.
  4. 4Finish it with the free tools: upscale, crop to the platform you need, compress before sharing.

Go beyond generating the image

Everything after the generation, on the same site.

Upscale to 4K →Remove the background →Crop for a platform →Compress before sharing →All AI apps →

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