Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 496

upper-left corner of the screen if you don't select Zoom Producer Point. If you select Zoom Producer Point, the point
moves with the universe as it is zoomed out, and the point ends up closer to the center of the screen.
Determines the rate at which bubbles are generated. This control does not affect the number of
Production Rate
bubbles per frame. Rather, the rate is the average number of bubbles generated every 30th of a second. Higher
numbers yield more bubbles.
If a large number of bubbles appear in the same point at the same time, some may pop. If you want a lot of foam,
increase the values for Producer X Size and Producer Y Size so that the bubbles don't immediately pop each other.
Bubbles controls
Specifies the average size for adult bubbles. Size Variance, Bubble Growth Speed, and Random Seed also affect
Size
the size of a bubble in any particular frame.
Specifies the range of possible bubble sizes. This control uses the Size value as the average and creates
Size Variance
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).
Specifies the maximum life of a bubble. This value is not absolute; if it were, the bubbles would all pop after
Lifespan
the same lifespan, as if they were hitting a wall. Rather, this value is a target lifespan; some bubbles pop early, and
others may last until the end.
Specifies how fast a bubble reaches full size. When a bubble is released from the producer
Bubble Growth Speed
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.
Influences how likely a bubble is to pop before it reaches its Lifespan limit. Lowering a bubble's Strength
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.
Physics controls
The Physics controls specify the motion and behavior of the bubbles:
Sets the speed of the bubble as it is emitted by the producer point. This speed is affected by the other
Initial Speed
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.
Sets the initial direction in which the bubble moves as it emerges from the producer point. This is
Initial Direction
affected by other bubbles and other Physics controls.
Sets the speed of the wind that pushes the bubbles in the direction specified by Wind Direction.
Wind Speed
Sets the direction in which the bubbles blow. Animate this control to create turbulent wind effects.
Wind Direction
Bubbles are affected by wind as long as Wind Speed is greater than 0.
Applies small random forces to the bubbles, making them behave chaotically.
Turbulence
Randomly changes the shape of bubbles from perfectly round to a more natural elliptical shape.
Wobble Amount
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