Iridescent Soap Bubble — Thin-Film Color Shift & Wobble
Real soap bubbles get their shifting rainbow sheen from thin-film interference: light reflecting off the front and back of the microscopically thin liquid film interferes constructively and destructively depending on film thickness and viewing angle. This scene approximates that with a per-vertex color computed from a simulated thickness field and a fresnel (view-angle) term, on top of a wobbling sphere mesh mimicking surface-tension oscillation.
- 128×96 segment sphere displaced per-vertex by three overlapping sine wobble modes
- Per-vertex color driven by simulated film-thickness field plus fresnel view term
- Physical transmission/clearcoat material for glassy, semi-transparent film look
- Additive outer rim shell adds a soft edge-glow highlight