Gravity

This is a global daemon acting with equal strength at any point of the 3D space.

Linked Fluids

All fluid containers inside the drag-and-drop field will be affected by the daemon. The first fluid container in the scene is linked automatically, others have to be attached manually.

Affect

There are two options:

• "Force" accelerates the particles and they become faster and faster as long as the force is acting on them. 
• “Velocity” only works with particles and adds the daemon's "Strength" value to a particles speed. The resulting peak velocity remains constant during the simulation.
  An example: Let's assume the daemon's "Strength" is 9.8 and the emitter's "Speed" value is 2.0. Here, a particle's velocity will be roughly 11.8 m/s.

Strength

This is the dimension of the gravitational acceleration and it depends on your current location. “Strength" accepts both positive and negative values. The "Strength" parameter is also known as “g”. Here are some value for the most important celestial bodies:

Bounded

You can choose from three options to restrict the daemon's scope:

• “No” turns on the global unrestricted force.
• “Box” restricts gravity to the inside of a box that can be scaled like any other object. Change the shape’s size with the parameters under “Object” or Cinema 4D's scale tools.
• “Plane” enables a plane in the viewport. The option restricts the effect to the particles at one side of that plane.

Inverse

This option is only available with "Bounded" set to "Box" or "Plane". When active the force will act outside the viewport gizmo.