This guy created a big 3D Scanner using 39 “Raspi” boards: http://www.instructables.com/id/Multiple-Raspberry-PI-3D-Scanner/
He was very smart on this design because all 39 boards take a picture at same time then he doesn’t get nonalignment issues. But unfortunately there is a flaw: he depends on online services like Autodesk Recap Photo to convert these photos to a 3D model.
Maybe you didn’t realize what the flaw is: Easy, Recap service could become paid or autodesk could shutdown this services without caring about orphans users.
Then searching for alternatives I found Insight3D: http://insight3d.sourceforge.net
This software could eventually be used to replace Recap Photo and could do it offline, not depending on external services to convert your photos to 3D objects.
These kind of software are used on tomography reconstruction and magnetic resonance.