It occurred to me today that the Polar printer looks a lot like some of the 3D scanners I've seen. Made me wonder how hard it would be to build scanning functionality in.
This should be relatively straight forward. 1 or 2 wings to hold the lasers and some processing on the Pi - a box/backdrop to provide a clean background would be helpful.
And there are already opensource Pi packages for doing this exact thing. It's just a matter of having the Pi host this and the modified OctoPi package and the interface between both.