Dr. Zarkov has significantly updated his work since then
see -
Emil Zarkov's Design Thread - ModelArt
SOFTWARE: SurfMaster v4.1 by Emil Zarkov :: ModelArt :: Paper Models :: ZarkovModels Store
http://cadbest.com/store/files/Surfm...UserManual.pdf
Don't know of any other designer using this software which also needs Corel for graphics.
Rhino and Surfmaster seem to be the only two programs using "traditional" geometry to unfold
all possible developable surfaces.
Pepakura does it by flattening meshes and can get messy results.
Since TurboCad 15 Pro (needs to be upped to 15.2) development of complex conical sections and flat surfaces has been possible but they haven't improved that feature in later versions. It can also do a lot of it's own graphcis. Can also import/export to Pepakura for non-conical developable surfaces. It can legitimately be purchased cheaply second hand