Okay, going right back to basics. Have created a pure simple cube (4 vertices) in 3DS and exported it. Opened the file in pepakura. all I see in the 3D model window is a single square representing one of the faces of the cube, with all 4 lines representing the cube shown in red. I run 'Create Development' and what I get in the Development Window is 3 complete sides, and 6 sets of two triangles. Anyone have any idea what is going wrong, or what I need to do to fix it? Do 3DS and Pepakura have compatilbility issues and should I just move to Metasequoia (if so, anyone got a link?). Best Regards Joe.