Apple Shake 4 Tutorials - Manual (Page 150)

150 Tutorial 4 Working With Expressions
2 Drag the Viewport onscreen controls to enlarge the canvas to reveal that the RGrad exists
outside of the frame boundary. You can drag a corner or an side of the transform overlay.
To correct this, use one of the following (but not both) solutions:
Solution 1: Control the Background Color
Background Color is considered everything outside the Domain of Definition (DOD) of
the image. The DOD is normally the frame of the image, but could be smaller. For
example, when you view RGrad1, the DOD is described by the RGrad itself, and is the
area inside of the green box. The green box is the DOD. The DOD of the ceiling element
is the frame border itself.
To add a SetBGColor node:
1 Rewire the Viewport (created earlier) to the Over1 element (see the illustration on the
following page).