A bold, grainy gradient. Big glowing fields of violet and electric blue, with a hot pink accent, drift slowly round a deep indigo base, their edges softly warped so they never look like plain circles. A visible film grain over the top gives the printed, tactile look that flat gradients lack.

Made for launch and landing pages, music, tech and fashion brands, posters and social backgrounds. Set the base and three glow colours, the grain strength, still or moving grain, how far the glows spread and their size. The demo has three presets: Violet blue, Rose tangerine and Lagoon.

What you get: a GLSL ES 3.00 fragment shader for plain WebGL2, an ES module that returns a three.js ShaderMaterial, a Shadertoy version, and a demo page that runs offline with a small settings panel. For video editors there is a 10-second 1920 x 1080 H.264 loop that plays end to start without a seam.

It runs in one pass with no textures needed, at about 0.5 ms of GPU time per frame at 1920 x 1080 on a recent laptop. The README covers set-up in WebGL2, three.js and Shadertoy, every uniform with its default and range, and performance notes.