Bubbles controls for the Foam effect

Adjust the following Bubbles controls to specify the size and appearance of the bubbles:

Size

Specifies the average size for adult bubbles. Size Variance, Bubble Growth Speed, and Random Seed also affect the size of a bubble in any particular frame.

Size Variance

Specifies the range of possible bubble sizes. This control uses the Size value as the average and creates smaller-than-average and larger-than average-bubbles by using the range you specify here. For example, a default bubble Size of 0.5 and default Size Variance of 0.5 generate bubble sizes ranging from 0 to 1 (0.5 -.5 = 0 and 0.5 + 0.5 = 1).

Lifespan

Specifies the maximum life of a bubble. This value is not absolute; if it were, the bubbles would all pop after the same lifespan, as if they were hitting a wall. Rather, this value is a target lifespan; some bubbles pop early, and others last until the end.

Bubble Growth Speed

Specifies how fast a bubble reaches full size. When a bubble is released from the producer point, it generally starts out rather small. If you set this value too high and you specify a small producer area, the bubbles pop each other, and the effect generates fewer bubbles than expected.

Strength

Influences how likely a bubble is to pop before it reaches its Lifespan limit. Lowering a bubble's Strength makes it more likely to pop early in its life, when forces like wind and flow maps act upon it. Lower values are good for soap bubbles. The highest value is recommended for flocking animations.

Set this value low, and set Pop Velocity high to create chain reactions of popping bubbles.