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Implementing a Foil Sticker Effect
A breakdown of how to build a custom Three.js shader that recreates the iridescent, sparkling look of foil stickers using vertex deformation, angle-based color shifts, and procedural flakes.
In this post, I’ll walk you through how to create a custom shader in Three.js that simulates the look of a foil sticker, complete with angle-dependent iridescence and sparkling metallic flakes. The goal is to capture that premium, holographic effect you see on collectible stickers, trading cards, and high-end packaging, but to render it in real time directly in the browser. Together, angular hue shifts and flake sparkles create a convincing illusion of printed holographic foil without expensive rendering tricks.
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