Individual Stroke Seeds; Selecting Composite Paint Options For Vector Paint (Pro Only) - Adobe AFTER EFFECTS 7.0 Manual

ADOBE AFTER EFFECTS 7.0
484
User Guide
Low Pressure Detail (left), Medium Pressure Detail (center), and High Pressure Detail (right)
When selected, this option creates a different random wiggle seed for each stroke on a layer.

Individual Stroke Seeds

Because the Wiggle Controls apply to all strokes on a layer, the wiggle parameters are always the same. To randomize
the wiggling of the individual strokes, select the Individual Stroke Seeds option.
If Individual Stroke Seeds is not selected, all strokes use the same wiggle seed, so they all have the same spatial wiggle
values. For example, two strokes exactly on top of each other will wiggle equally. By setting individual seeds for each
stroke, you avoid identical strokes wiggling in the same way.
Original (left), Individual Stroke Seeds Off (center), and Individual Stroke Seeds On (right)

Selecting Composite Paint options for Vector Paint (Pro only)

Various options control the way Vector Paint composites strokes on a layer. Select the option you want in the Effect
Controls panel for a layer, in the Composite Paint pop-up menu under Vector Paint. These options control two
things: what you see in the Composition panel as you work, and what aspects of the layer the strokes affect, including
what happens when you preview and render the composition.
As you paint and erase, you can either hide or display the footage image. You have similar viewing options when you
paint using matte and alpha-channel options.
As you work, painting and erasing can block pixels in an original image, such as a footage file or solid. You can also
paint on a virtual layer above or below that image (although this does not appear as a separate layer in the Timeline
panel). You can paint and erase to adjust mattes and alpha channels for the original image. You can restrict Vector
Paint strokes to the areas inside or outside the original alpha channel.
Each Composite Paint option specifies a unique combination of work view, layer type (image, matte, or alpha
channel), and placement of strokes relative to the original image. You can select strokes later and change the
Composite Paint option, but it is a good idea to understand what results each option produces before you start
painting.
The following illustrations use the same basic example of an imported image. A paint stroke has been applied,
followed by an erasure stroke. The original image is the green layer, including an alpha channel that reveals the
background layer. For these examples, the Transparency Grid is turned on. (Click the Transparency Grid button
at the bottom of the Composition panel).