10. Press q (or the Surface button at the bottom of the Modeler interface) and name
this new polygon PlanterMask. Then save the object.
When building this mask (or any mask), you only need to create enough of an object
to meet your needs. For example, in the current exercise, you do not need to create
a mask for the stairs, columns, or floors. You??™re building a mask so that a vase can pass
behind it. Therefore, you only need to create a polygonal mask for the planter that is
big enough to make the Vase object appear to be behind it. If, however, you had a
moving object, you would then need to build a larger mask.
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Chapter 16 Compositing and Postprocessing Techniques 659
11. After the object has been saved, send it to Layout from the drop-down arrow at
the very top right of the Modeler interface, as shown in Figure 16.9.
Figure 16.9 Use the Send Object to Layout command at the top right of the Modeler interface.
12. After the object has been sent to Layout, move and position it so that it rests in
front of the planter in the image. You??™ll need to do this from the Camera view, as
that is the only way to see the image in Layout.
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