Interface AnimationConfig

Render only when something changed: a loop tick skips the render when no request, per-frame callback, camera/drawing-buffer change or continuous consumer (cinematic noise, real-time recording) asks for one. The loop keeps ticking and idling exactly as before. false — or ?renderAlways for one session — restores the historical render-every-tick loop. See scene/animation/animation-controller.ts.

Frame pacing: after a pathologically slow frame the loop waits out a bounded cooldown before scheduling the next one, so the main thread is not held at a 100 % duty cycle of long tasks (#1724). See scene/animation/animation-controller.ts.