Pan/zoom camera over a bezier path on a raster map in Apple Motion
After a lot of experimentation, I have figured out the answer to this question. Make sure the raster map and bezier path are in the same group, open the group's inspector, click on the Group tab, and in the Group Controls section, check the "Flatten" checkbox.  Now, the bezier path will be flattened against the raster map, and there won't be any perspective issues when the camera flies around.