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Table Of Contents
The order of two layers affected by the Exclusion blend mode does not matter.
Blend Modes That Manipulate Alpha Channels
The Stencil and Silhouette blend modes let you use a single layers alpha channel or luma
values to isolate regions of background layers and groups.
Note: Similar effects can be accomplished using shape and image masks. In addition,
masks might provide you with a greater degree of control, depending on your needs.
For more information, see Using Shapes, Masks, and Paint Strokes.
Stencil modes crop out all non-overlapping parts of layers underneath the layer used as
the stencil. Silhouette modes do the opposite, punching holes in overlapping layers
underneath in the shape of the layer used as the silhouette.
When working in a 3D group, changes in depth order affect the Stencil and Silhouette
blend modes differently. For example, if you have two layers in a 3D group and the upper
layer is set to Stencil Alpha or Stencil Luma, the blend mode remains in effect when the
upper layer is moved behind the lower layer in Z space. If you have two layers in a 3D
group and the upper layer is set to Silhouette Alpha or Silhouette Luma, the blend mode
does not remain in effect when the upper layer is moved behind the lower layer in Z
space.
308 Chapter 7 Basic Compositing