Autodesk 62205-051408-9001 User Guide - Page 252

10 Using Masks the output of the operator (and the name of the operator appears in the upper left corner). When you apply a mask operator in the Schematic and/or in the Operators panel, it does not automatically become the current operator. Double-click the operator in the Workspace panel or operator node in the Schematic to make it the current operator. Note: Press CTRL when adding an operator from the Operators panel to display the operator's controls. If you are adding the mask to a layer, the effect on the layer in relation to the entire composite is not displayed because the mask operator occurs before the image is transformed within a composite, and thus displays the original image without transforms. To see the effect of the mask, you can display the composite result in another viewport simultaneously, or switch the viewport back to the composite. You can also set a background image that is displayed in the mask operator context for preview purposes-this image does not affect composite output. For more information, see Background. Note: If you apply a transform to a layer, such as scale or rotation, and you want to apply a mask to the transformed layer (or group of layers), nest the layer prior to adding the mask operator. To add a mask operator to a layer in a composite: 1. Select the layer to which you want to add a mask. Note: You can also select the operator to which you want to add the mask (for example, the Footage operator). 2. Choose Operators | Mask, then choose one of the following options. Choose To Draw Mask Access the mask tools and draw a polygon mask (the Bezier Mask tool is automatically selected). Elliptical Mask Access the mask tools and automatically create an elliptical mask. Choose Rectangular Mask To Access the mask tools and automatically create a rectangular mask. If you chose Draw Mask, the following tools are available in the Toolbar: Freehand Mask, Rectangular Mask, Elliptical Mask, Bezier Mask, and B-Spline Mask. Select a tool and begin adding control points for the mask object. If you choose Elliptical Mask or Rectangular Mask, a mask appears in the viewport. 3. Click and drag the handles of the mask's bounding box to adjust it as needed. 4. To change the shape of the mask, click the Edit Control Points tool in the Toolbar (F2). For more information, see Editing Masks. 5. Set the Invert option according to the type of masking you want. If Invert is disabled, the mask removes the area outside the mask shape and keeps the area inside the mask shape. This is a "holdout mask." When Invert is enabled, the mask is a "garbage mask," which means it removes the area inside the mask shapes and keeps the area outside the mask shape. The initial mask is simply a starting point. You can show the Toolbar to select another tool (for example, the Arrow tool to modify the mask object), or add more masks in the same operator. 236