5.1.1

Chapter 20 Shapes, masks, and paint strokes 891
After you’ve nished drawing the mask, its eect is immediate, and the mask you created
appears nested underneath the layer to which it’s applied in the Layers list and Timeline.
You can create multiple masks for a single layer. To add masks, select the object again, then
follow the above procedure. By default, all new masks are set to the Add blend mode. You can
change the Mask Blend Mode parameter in the Inspector to combine masks for dierent eects.
For more information about using multiple masks together, see Combine multiple masks on
page 892.
Mask objects in a 3D project
When working in a 3D project, you might want to mask a layer after it is transformed or the
camera is rotated. You can immediately switch a transformed object into a “work view” using
the Isolate button in the Layers list or Timeline, or the Isolate command in the Object menu.
After you add a camera to a project, the Isolate option becomes available for any layer, group, or
camera in the project.
Note: Masks can be applied to the layers in a 3D group, but not the 3D group itself (unless
you’ve activated the Flatten checkbox in the Group Inspector). For more information about the
Flatten checkbox, see Mask controls in the Inspector on page 899.
Isolate a layer
1 In the 3D project, select the layer to mask.
In this example, the center leopard image is the layer to be masked.
The Isolate button appears to the right of the layer name in the Layers list.
Note: A project must contain a camera before you can access the Isolate option.
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