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Chapter 16. Production Bundle Techniques > Revealing a Layer with Vector Paint ...

Revealing a Layer with Vector Paint Strokes

Although the most obvious use of Vector Paint is to “paint” visible strokes on a layer, it can be just as useful in modifying a layer's alpha channel. Though you can achieve similar effects with masking or keying techniques, this way, you can conceal or reveal parts of the image using Vector Paint's unique tools. The following task explains how to use Vector Paint to reveal a layer's text image by modifying the layer's alpha channel stroke by stroke.

To prepare Vector Paint to reveal the layer image:

1.
Select the layer you want painted strokes to reveal.

2.
Choose Effect > Paint > Vector Paint (Figure 16.69).

Figure 16.69. Choose Effect > Paint > Vector Paint.


The Vector Paint effect appears selected in the Effect Controls window (Figure 16.70). The Composition window displays the Vector Paint toolbar.

Figure 16.70. The Vector Paint effect appears selected in the Effect Controls window.


3.
In the Composite Paint pull-down menu, choose Over Original (Figure 16.71).

Figure 16.71. In the Composite Paint pull-down menu, choose Over Original.


This option is used as a temporary setting. Later, you'll change the setting so that strokes modify the layer's alpha channel.

4.
In the Playback Mode pull-down menu, choose Animate Strokes (Figure 16.72).

Figure 16.72. In the Playback Mode pull-down menu, choose Animate Strokes.


This option simulates the act of writing by revealing the stroke gradually, beginning at the stroke's starting time.

5.
In the Vector Paint toolbar, select the Paint tool and the Paint brush.

These options are also available in the Effect Controls window.

6.
In the Effect Controls window, select the options you want for Brush Settings.

Brush Settings include Radius, Feather, Opacity, and Color.


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