Motion
Counter-motion layers
Let the background drift against the hero, at about a quarter of its speed.
Takeaways
- Hero left, ambient right.
- Ambient at 20 to 30 percent of hero speed.
- Support arrives two to four frames behind.
What it means
A frame with a hero, support and an ambient layer feels deep. The ambient layer moves slowly in the opposite direction, so the hero seems to travel through space instead of sliding on a flat sheet.
In a RasanAI film
Every showcase shot has a primary, a secondary a few frames behind, and an ambient layer drifting at 20 to 30 percent of the hero speed and against its direction. The gate warns above 40 percent, and when the ambient drifts the hero's way.
Origins and sources
Parallax, used in animation since the multiplane camera; Disney's secondary action. The speed ratio is measured from real launch films.