#334Pearl Iridescence

A single rounded pearl on dark velvet. A fake sphere normal drives a broad, satin diffuse highlight over a silky warm-white body — no sharp catch-light. Fresnel selects among three gentle flip-flop overtones (pink, green, blue) blended on the Oklab ring so the nacre shifts hue as the surface tilts, always pale and low-chroma. Unlike the thin-film flow of the oil-slick and soap-bubble sketches, the colour here is quiet and rounded — deliberately understated. It drifts on its own; hover to tilt the pearl and shift the overtone.