High Quality Content by WIKIPEDIA articles! PTgui is a commercial panorama photo stitching program for Windows and Mac OS X developed by New House Internet Services BV. PTgui was initially created as a GUI frontend to Helmut Dersch`s Panorama Tools. It currently features its own stitching and blending engine along with compatibility to Panorama Tools. PTgui supports telephoto, normal, wide angle and fisheye lenses to create partial cylindrical up to full spherical panoramas.