Adobe After Effects CS4 Manual de usuario descargar pdf (Pagina 178)

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USING AFTER EFFECTS CS4

Layers and properties

Last updated 12/21/2009

Blending mode reference

All blending modes described in this section are available for blending between layers. Some of these options are

available for paint strokes, layer styles, and effects.

For in-depth information about the concepts and algorithms behind these blending modes as implemented in several

Adobe applications, see the

PDF reference material on the Adobe website.

The blending mode menu is subdivided into eight categories based on similarities between the results of the blending

modes. The category names do not appear in the interface; the categories are simply separated by dividing lines in the menu.

Normal category Normal, Dissolve, Dancing Dissolve. The result color of a pixel is not affected by the color of the

underlying pixel unless Opacity is less than 100% for the source layer. The Dissolve blending modes turn some of the

pixels of the source layer transparent.

Subtractive category Darken, Multiply, Color Burn, Classic Color Burn, Linear Burn, Darker Color. These blending

modes tend to darken colors, some by mixing colors in much the same way as mixing colored pigments in paint.

Additive category Add, Lighten, Screen, Color Dodge, Classic Color Dodge, Linear Dodge, Lighter Color. These

blending modes tend to lighten colors, some by mixing colors in much the same way as mixing projected light.

Complex category Overlay, Soft Light, Hard Light, Linear Light, Vivid Light, Pin Light, Hard Mix. These blending

modes perform different operations on the source and underlying colors depending on whether one of the colors is

lighter than 50% gray.

Difference category Difference, Classic Difference, Exclusion. These blending modes create colors based on the

differences between the values of the source color and the underlying color.

HSL category Hue, Saturation, Color, Luminosity. These blending modes transfer one or more of the components of

the HSL representation of color (hue, saturation, and luminosity) from the underlying color to the result color.

Matte category Stencil Alpha, Stencil Luma, Silhouette Alpha, Silhouette Luma. These blending modes essentially

convert the source layer into a matte for all underlying layers.

The stencil and silhouette blending modes use either the alpha channel or luma values of a layer to affect the alpha

channel of all layers beneath the layer. Using these blending modes differs from using a track matte, which affects only

one layer. Stencil modes cut through all layers, so that you can, for example, show multiple layers through the alpha

channel of the stencil layer. Silhouette modes block out all layers below the layer with the blending mode applied, so

you can cut a hole through several layers at once. To keep the silhouette and stencil blending modes from cutting

through or blocking all layers underneath, precompose the layers that you want to affect and nest them in your

composition.

Stencil (left) shows all layers below the stencil layer through the frame of the alpha channel of the stencil layer; silhouette (right) cuts a hole

through all layers below the silhouette layer.

Utility category Alpha Add, Luminescent Premul. These blending modes serve specialized utility functions.

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