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Chapter 9. Edit Objects > Using mattes

Using mattes

In order to understand how mattes work in LiveMotion, envision the kind of matte that's used to frame a photograph or a drawing. A matte in LiveMotion, like a cardboard matte, controls how much of an image is visible, except in this case you have a virtually unlimited range of matte shapes to work with—from geometric to irregular. And like a cardboard matte, a LiveMotion matte has no effect on the image itself. Try placing a rectangular image into LiveMotion (e.g., a Photoshop image), and then change the active matte to make the image show through an opening of a different shape. Have some fun with this.

To apply a matte to an image object:

METHOD 1 (Library palette)

1.
Select the image object to which you want to apply a matte (Fig. 1). You can use an object that was created in another application (e.g., Illustrator, Photoshop).


Figure 9.32.


2.
Show the Library palette.

3.
Click a shape on the Library palette to use as the matte.

4.
Click the Make Active Matte button at the bottom of the Library palette.

or

Show the Properties palette, then drag the Library swatch or name over the Active Matte thumbnail on the Properties palette (Fig. 2). The image object's contour will become the shape of the current Active Matte, and "Active Matte" will appear automatically on the Alpha Channel pop-up menu.Resize the image object, if desired (Figs. 34).


Figure 9.33.



Figure 9.34.



Figure 9.35.


METHOD 2 (Paste Active Matte)

1.
In the composition window, select an image object (shape) that has the contour that you want to use as a matte.

2.
Choose Edit menu >Copy.

3.
Select the object to which you want to apply the matte.

4.
Choose Edit menu >Paste Special > Paste Active Matte. Note the Active Matte thumbnail on the Properties palette.


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