The software can take an animated 3D character and figure out where best to place its joints. In what is referred to as reverse rendering, the software first looks at an animated character’s shape and movement and identifies the best joint points. It then adjusts the size of the different parts of the model so as to allow a real joint to work once printed. Optimizations are then carried out to produce a model as close as possible to the on-screen version, but at the same time workable as an actual real-world, articulated 3D model.
Clearly this software is a little ahead of its time in terms of home 3D printing. Right now you’d be able to create the models and basic joints to clip together yourself, but using metal joints and being able to apply a color coating to recreate the character perfectly are desirable. Maybe that will be possible a few 3D printer generations from now.