This sounds very much like an instance of this issue, from the FAQ: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_is_my_imported_STL_file_only_showing_up_with_F5_but_not_F6.3F -Marius -- View this message in context: http://forum.openscad.org/openscad-stl-almost-unusable-tp14472p14609.html Sent from the OpenSCAD mailing list archive at Nabble.com.