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Table Of Contents
Preserve Opacity is an easy way to selectively reveal part of a layer. In this example, by
setting the blend mode of the top color wash layer to Exclusion, you get the resulting
image:
By selecting the Preserve Opacity checkbox for the color wash layer on top, only the
overlapping parts are displayed, and the superimposed image only affects the Dolphin
layer.
To turn on Preserve Opacity
µ
With a layer selected in the Canvas, Layers list, or Timeline, select the Preserve Opacity
checkbox in the Properties Inspector.
Using Blend Modes
Each blend mode presents a different method for combining two or more images together.
Blend modes work in addition to a layer’s alpha channel and opacity parameter.
To understand the descriptions of each blend mode in this chapter, its important to
understand that blend modes mix colors from overlapping images based on the brightness
values in each color channel in an image. Every image consists of red, green, blue, and
alpha channels. Each channel contains a range of brightness values that define the intensity
of each pixel in the image that uses some of the channel’s color.
292 Chapter 7 Basic Compositing