Smolder
Radial warmth radiating through animated turbulence with heat shimmer, ember particles, and cool blue edges.
What is Smolder?
Smolder is a free WebGL web effect in the TappyPrism library. Radial warmth radiating through animated turbulence with heat shimmer, ember particles, and cool blue edges. 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 (smolder.html) with zero dependencies — no npm package, no framework, no build step. It exposes 2 live parameters — Heat Intensity, Turbulence — adjustable in the browser or at runtime.
Parameters
| Parameter | Key | Range | Default |
|---|---|---|---|
| Heat Intensity | HEAT_INTENSITY | 0.3 – 2 | 1 |
| Turbulence | TURBULENCE | 0.3 – 2 | 1 |
How to add Smolder to your page
- Download the standalone file smolder.html and copy its source into your project.
- Or embed it as a background iframe:
<iframe src="https://prism.tappypotato.com/fx/smolder.html" style="position:fixed;inset:0;width:100%;height:100%;border:0;z-index:-1" title="Smolder"></iframe> - Tune it at runtime with postMessage:
iframe.contentWindow.postMessage({ type: 'param', name: 'HEAT_INTENSITY', value: 1 }, '*');
Frequently asked questions
What is Smolder?
Smolder is a free WebGL web effect in the TappyPrism library. Radial warmth radiating through animated turbulence with heat shimmer, ember particles, and cool blue edges. 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 (smolder.html) with zero dependencies — no npm package, no framework, no build step. It exposes 2 live parameters — Heat Intensity, Turbulence — adjustable in the browser or at runtime.
How do I add Smolder to my website?
Download the standalone file at https://prism.tappypotato.com/fx/smolder.html and copy its source into your page, or embed it as a background iframe: <iframe src="https://prism.tappypotato.com/fx/smolder.html" style="position:fixed;inset:0;width:100%;height:100%;border:0;z-index:-1" title="Smolder"></iframe>. Tune it live with postMessage, e.g. iframe.contentWindow.postMessage({ type: 'param', name: 'HEAT_INTENSITY', value: 1 }, '*').