Diamond Caustics
Light refracting through rotating diamond facets casting prismatic caustic patterns.
What is Diamond Caustics?
Diamond Caustics is a free WebGL web effect in the TappyPrism library. Light refracting through rotating diamond facets casting prismatic caustic patterns. It is rendered on the GPU by a fragment shader, so it costs almost nothing on the CPU and works well as a full-screen background. It ships as a single self-contained HTML file (diamond-caustics.html) with zero dependencies — no npm package, no framework, no build step. It exposes 2 live parameters — Rotation Speed, Brilliance — adjustable in the browser or at runtime.
Parameters
| Parameter | Key | Range | Default |
|---|---|---|---|
| Rotation Speed | ROTATION_SPEED | 0.1 – 2 | 0.5 |
| Brilliance | BRILLIANCE | 0.3 – 2 | 1 |
How to add Diamond Caustics to your page
- Download the standalone file diamond-caustics.html and copy its source into your project.
- Or embed it as a background iframe:
<iframe src="https://prism.tappypotato.com/fx/diamond-caustics.html" style="position:fixed;inset:0;width:100%;height:100%;border:0;z-index:-1" title="Diamond Caustics"></iframe> - Tune it at runtime with postMessage:
iframe.contentWindow.postMessage({ type: 'param', name: 'ROTATION_SPEED', value: 0.5 }, '*');
Frequently asked questions
What is Diamond Caustics?
Diamond Caustics is a free WebGL web effect in the TappyPrism library. Light refracting through rotating diamond facets casting prismatic caustic patterns. It is rendered on the GPU by a fragment shader, so it costs almost nothing on the CPU and works well as a full-screen background. It ships as a single self-contained HTML file (diamond-caustics.html) with zero dependencies — no npm package, no framework, no build step. It exposes 2 live parameters — Rotation Speed, Brilliance — adjustable in the browser or at runtime.
How do I add Diamond Caustics to my website?
Download the standalone file at https://prism.tappypotato.com/fx/diamond-caustics.html and copy its source into your page, or embed it as a background iframe: <iframe src="https://prism.tappypotato.com/fx/diamond-caustics.html" style="position:fixed;inset:0;width:100%;height:100%;border:0;z-index:-1" title="Diamond Caustics"></iframe>. Tune it live with postMessage, e.g. iframe.contentWindow.postMessage({ type: 'param', name: 'ROTATION_SPEED', value: 0.5 }, '*').