3D Compositing with Action > Action: The Particle System > Manipulating Particles >
Simulating Gravity

Use a gravity manipulator to simulate the effects of gravity. This manipulator works on speed or position. The Power field has no effect.

Magnitude specifies the gravitational pull in pixels per frame. A higher magnitude produces a higher gravity, which exerts a greater influence on each particle.

The icon for a gravity manipulator uses an arrow to indicate the direction of the influence. You can change the position and rotation of the arrow using the Axis menu. You can also change the scale of the gravity manipulator as another way of increasing its influence.

The following figure provides an example of creating a simple particle stream influenced by the gravity manipulator. The settings in the Particle Manipulator menu and the resulting effect are shown.