Apple Shake 4 Tutorials - Manual (Page 254)

254 Tutorial 9 Creating Clean Plates
When creating a clean plate, try to select frames with as little overlap of the foreground
characters as possible. Because this is not always practical, you should always request a
clean plate shot whenever possible (and save yourself the tedious task of going
through this tutorial).
You will modify frame 1 (in this case, named bridge001) because the people are smaller,
which means less area to clean up.
Before you can use one image to fix the other, you need to align the two plates.
To align the bridge001 and bridge038 plates:
1 In the Node View, select the bridge038 node, then attach a Transform–Move2D node.
bridge001 bridge038