Apsis Aerospace

Trigger: page scroll — overall scroll progress maps directly to a frame index, so scrolling forward plays the sequence and scrolling back rewinds it, like scrubbing a video with the scrollbar.

Motion: a fixed full-viewport canvas draws a preloaded image sequence (~144 AVIF frames) behind the page while normal content sections scroll over it; HUD elements (frame counters, progress rails, live stats) update from the same progress value.

Structure: fixed canvas layer + scrolling content layer + rAF-throttled scroll handler. Best for: cinematic heroes where a rendered or filmed shot should evolve continuously behind multi-section copy.