Image planes act as
visual references while building a model or as a mean of compositing background
or foreground images during rendering.
Fix a missing image file
Choose File > Image References > Image References to locate the image plane.
When Alias cannot find an image plane, a small question mark
appears at the left of the path name.
Locate the missing image plane path name
in the Image Reference List window,
then click the arrow (>) to
the right of the pathname.
Locate the correct directory and image
plane file.
Click the Replace button.
Click any view window that is not currently
active to refresh the view and display the image.