Apple Shake 4 - Manual (Page 531)

Chapter 19 Using Masks 531
5 To create a mask that gives the appearance of a “spotlight,” do one of the following:
• Create an RGrad node (in its own branch), and connect the RGrad output to the M
(mask) input on the side of the Brightness node.
• In the Brightness parameters, choose RGrad from the Mask pop-up menu.
Note: To create the node type already in the Mask shape menu, click Create. For
information on the rotoscoping or paint tools and their onscreen controls to draw and
edit masks, see Chapter 21, “
Paint ,” on page 579.
An RGrad is connected as the mask input for the Brightness node, and the masked
portion of the image is darkened.
6 In the Node View, select the RGrad node, click the Transform tab, then click the
CornerPin node.
7 Using the onscreen controls and the following image as a reference, adjust the RGrad
image to put the circle in perspective.