Version 12 introduced several "under-the-hood" improvements that differentiate it from previous iterations and its competitors:
If you use a nodal ninja and a DSLR to create 360° tours for Matterport or 3DVista, PTGui Pro 12 is non-negotiable. The "exposure smoothing" feature ensures that the zenith (sky) and nadir (tripod cap) match perfectly with the horizon. ptgui pro 12
tab to paint "Red" (hide) or "Green" (keep) areas. This is useful for removing "ghosts" (moving people) or forcing specific parts of an image to appear in the final stitch. Batch Stitching Batch Builder ptgui pro 12
Key features and improvements