This is a handy digital photography tool for your Mac. It assembles a panoramic scene from a mix of overlapping photos.
It puts the photos together and eliminates redundant, overlapped parts of the scene. Then each photo's border is smoothed away until only one giant scene is left.
Hugin does a pretty great job, but it needs a bit of assistance. You’ll select control points for each of your photos. Those are points that overlap with one or more of the other photos. It uses them to put the photos together and smooth it over.