Create a mask – Apple Motion 5.1.1 User Manual
Page 889
Chapter 20
Shapes, masks, and paint strokes
889
Use the mask tools to create different shapes with which to mask a layer or group. There are five
mask tools available that are analogous to the five shape-drawing tools covered earlier in this
chapter:
•
Rectangle Mask tool
•
Circle Mask tool
•
Freehand Mask tool (used like the Paint Stroke tool)
•
Bezier Mask tool
•
B-Spline Mask tool
Note: You can also use an Image Mask to mask a layer. For more information, see
on page 902.
Important:
A mask cannot be applied to a nonflattened 3D group. (To flatten a 3D group,
select the Flatten checkbox in the Group Inspector.) A mask can be applied to a layer in a 3D
group. To add a mask to a layer that has been manipulated in 3D space, use the Isolate button.
Masks cannot be manipulated in 3D space. For example, the Position parameter for a mask
only includes the X and Y position parameters, but not the Z position parameter; the Rotation
parameter only includes Z, but not X or Y. For more information, see
on page 891.
Drawing and editing masks using these tools works identically to drawing and editing shapes.
The main difference is that while drawing a shape creates a new layer in your project, masks
must be drawn on top of another layer in your project. After you draw a mask, it is nested in
the specific layer or group for which it was created, in the Layers list and Timeline. When a mask
is attached to a layer, a mask icon appears to the right of the name of the layer. Turn the mask
display on or off by clicking this icon.
Click the mask
icon to turn mask
display on or off.
Note: Masks created for one layer can be copied or moved to other layers.
Important:
When a mask is applied to a 2D or flattened 3D group, the group is rasterized. For
more information, see
on page 1045.
Create a mask
Masks can be created on any layer in the Motion project.
67% resize factor