The File I posted first is bigger than necessary.
Here is another example file. If the camera path were curved (between Camera 2 and 3) you would get to see on the box. But as you can see the interpolation is linear.
https://www.dropbox.com/sh/5jb15wjbhjytsm1/AACoB9-w5ZEhb1NiNo8Pmxj7a?dl=0