Physics controls for the Foam effect

Adjust the following Physics controls to specify the motion and behavior of the bubbles:

Initial Speed

Sets the speed of the bubble as it is emitted by the producer point. This speed is affected by the other Physics parameters.

Low Initial Speed values in conjunction with the default producer size don't affect the results much because the bubbles bounce off each other. For more control over initial speed, increase the values for Producer X Size and Producer Y Size.

Initial Direction

Sets the initial direction that the bubble moves as it emerges from the producer point. This is affected by other bubbles and other Physics controls.

Wind Speed

Sets the speed of the wind that pushes the bubbles in the direction specified by Wind Direction.

Wind Direction

Sets the direction that the bubbles blow. Animate this control to create turbulent wind effects. Bubbles are affected by wind as long as Wind Speed is greater than 0.

Turbulence

Applies small random forces to the bubbles, making them behave chaotically.

Wobble Amount

Randomly changes the shape of bubbles from perfectly round to a more natural elliptical shape.

Repulsion

Controls whether bubbles bounce off each other, stick to each other, or pass through each other. With a value of 0, bubbles don't collide; they pass through each other. The higher the Repulsion value, the more likely bubbles are to interact with each other when they collide.

Pop Velocity

Controls how popping bubbles affect each other. When a bubble pops, it affects other bubbles around it by leaving a hole that other bubbles can fill, pushing other bubbles away, or popping other bubbles. The higher the value, the more popping bubbles affect one another.

Viscosity

Specifies the rate at which bubbles decelerate after being released from the producer point, and controls the speed of the flow of the bubbles. A high Viscosity value creates resistance as the bubbles get farther away from the producer point, causing them to slow down. If Viscosity is set high enough, the bubbles stop. The thicker the substance, the higher the Viscosity. For example, if you want to create the effect of bubbles traveling through oil, set Viscosity fairly high, so that the bubbles meet resistance as they travel. To create the effect of bubbles floating in air, set Viscosity fairly low.

Stickiness

Causes bubbles to clump together and makes them less vulnerable to other Physics controls like Wind Direction. The higher the Stickiness, the more likely the bubbles are to form clusters and cling. Use Stickiness and Viscosity to create a bubble cluster.