A circular iris shrinks to centre on Scene A (radius 75% to 0%), then expands from centre to reveal Scene B (0% to 75%), using clipPath circle() driven by interpolate(). The classic old-film iris transition recreated with modern Remotion hooks.
Iris speed and centre point are configurable. The two-phase close/open creates a natural scene break — ideal for cartoon-style content, retro aesthetics, comedic timing, or any video that references classic filmmaking.