Adobe After Effects CS4 Manuel d'utilisateur télécharger pdf (Page 499)

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USING AFTER EFFECTS CS4

Effects and animation presets

Last updated 12/21/2009

Opacity The opacity of the colored rectangles.

Blending Mode The blending mode to use to composite the checkerboard pattern on top of the original layer. These

blending modes work identically to the ones in the Timeline panel, except for the default None mode, which renders

the checkerboard pattern only.

Circle effect

The Circle effect creates a customizable solid disk or ring.

This effect works with 8-bpc color.

Edge None creates a solid disk. The other options all create rings. Each option corresponds to a different set of

properties that determine the shape and edge treatment of the ring:

• Edge Radius The difference between the Edge Radius property and the Radius property is the thickness of the ring.

• Thickness The Thickness property sets the thickness of the ring.

• Thickness * Radius The product of the Thickness property and the Radius property is the thickness of the ring.

• Thickness & Feather * Radius The product of the Thickness property and the Radius property is the thickness of the

ring. The product of the Feather property and the Radius property is the feather of the ring.

Feather The thickness of the feather.

Invert Circle Inverts the matte.

Blending Mode The blending mode used to combine the shape and the original layer. These blending modes behave

like the blending modes in the Timeline panel, except for None, which displays only the shape, without the original

layer.

Ellipse effect

The Ellipse effect draws an ellipse.

This effect works with 8-bpc, 16-bpc, and 32-bpc color.

Eyedropper Fill effect

The Eyedropper Fill effect (formerly the Color Picker effect) applies a sampled color to the source layer. This effect is

useful for quickly picking a solid color from a sample point on the original layer or picking a color value from one layer

and using blending modes to apply this color to a second layer.

This effect works with 8-bpc color.

Sample Point The center of the sampled area.

Sample Radius The radius of the sampled area.

Average Pixel Color Which color values are sampled:

• Skip Empty Samples the average RGB color values, excluding the color values of transparent pixels.

• All Samples the average of all RGB color values, including color values of transparent pixels.

• All Premultiplied Samples the average of all RGB color values, premultiplied with the alpha channel.

• Including Alpha Samples the average of all RGB color and alpha channel values. This setting results in the sampled

color also containing the average transparency of the sampled pixels.

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Adobe After Effects CS4 Manuel d'utilisateur Page 499

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