Portal: a tunnel of rings
A Portal fill draws a tunnel of rings rushing toward you, with light pulsing through them.
Try this
- Press play. In the top tunnel, waves of light run out toward you.
- Open the tunnel's Portal settings. Rings and Spacing set how deep it looks.
- Speed moves the rings and Twist turns them. Ring picks the shape.
- Drag Vanishing X and Vanishing Y to bend the tunnel, as at the bottom left.