#329Holographic Sticker Shine

A trading-card holo sticker. The base is a silver matcap — a procedural studio environment sampled by the surface normal — laid over a faintly crinkled sheet so it reads as polished chrome. Across it ride high-saturation rainbow hue bands, fract(uv·dir + t) colourised through Oklab so every hue stays equally vivid, their phase pushed by the crinkle and the viewing angle. The signature is the sparkle field: a sparse grid of facets that stay dark until the sweeping view angle lines up with them and then flash a hard, bright point — pop, pop, pop across the card. Move the pointer to swing the angle and set off bursts; press to make the whole card erupt.