Diamond shader preview: A cut gem turning in studio light, throwing rainbow fire and star-shaped glints.
ittybitty

Diamond

A cut gem turning in studio light, throwing rainbow fire and star-shaped glints.

Code

Use as

Copy embed: paste into Webflow, Framer, Squarespace or any HTML · Copy for agent: paste into Cursor or Claude · Copy code: the files for your own build.

For your own build, add diamond.js, ittybitty-shader.js, runtime.js and pointer.js next to this page. Highlighted values follow the controls.

<!-- Quickest: one element. Size it with CSS; it fills its box. -->
<script type="module" src="./ittybitty-shader.js"></script>
<ittybitty-shader effect="diamond" style="width: 100%; height: 480px;"></ittybitty-shader>

<!-- Or with JavaScript, for full control: -->
<canvas id="diamond" aria-hidden="true" style="width: 100%; height: 480px; display: block"></canvas>

<script type="module">
  import { diamond } from './diamond.js';

  const canvas = document.getElementById('diamond');
  const effect = diamond(canvas, {
    showBackground: true,
    cut: 'round',
    tint: '#ffffff',
    fire: 1,
    brilliance: 2.42,
    sparkle: 0.9,
    speed: 0.4,
    size: 0.62,
    lighting: 'studio',
    interactive: true,
    responsiveness: 0.5,
    background: '#050507',
    // Performance
    dpr: 1.5,
    adaptive: true,
  });

  // Later: effect.set(…), effect.pause(), effect.resume(), effect.destroy()
</script>

Details

A brilliant-cut stone turns slowly under softboxes and a ring light. Its facets are real planes, raytraced in one pass: light refracts in, bounces off the pavilion by total internal reflection and leaves through the crown, each part of the spectrum bending by its own amount, so edges of light split into rainbow fire. Facets that catch a light flare into four-pointed stars. Choose the cut and the stone, and tilt it with the pointer.

Payload
13.8 KB brotli for diamond.js, ittybitty-shader.js, runtime.js and pointer.js, measured at build time.
Resolution
Device pixel ratio capped at 1.5, so facet edges stay crisp.
Frame rate
Display rate.
When unseen
Stops rendering when the canvas leaves the viewport or the tab is hidden, and resumes where it left off.
Reduced motion
Shows a single still frame. The pointer still tilts it.
Layers
Up to five effects fuse into one shader and one draw call. Filters such as dithering and halftone process the layers beneath them.
Browsers
Any browser with WebGL2: Chrome and Edge 56+, Firefox 51+, Safari 15+.
Licence
MIT. Copy it, change it, ship it.