At first a like to add that this importer is Keiths project and that i only tried to pack it into a module.
since the development were sperated from FreeCAD until yesterday, i used github to keep track of found bugs. https://github.com/5263/FreeCAD/issues/
There is a issue for every OpenSCAD example file except for 001-005 and 011-015.
And please do me a favor, if you found a problem in example009 please to a little forum search to find the appropriate topic to describe the problem. Since example009 imposes a lot of different problems.
In example006 the main problem is the 'render' statement (https://github.com/5263/FreeCAD/issues/21
). In order to mimic the OpenSCAD behavior it should render a 'mesh'. And there has been a lot of disscussion about how close the module should mimic OpenSCAD.
The minkowski sum imposes serious problems, because it doesn't have a counterpart in OCCT. Similar to glide, hull and subdiv. But its a widespread technique to filet edges using the minkowski statement in OpenSCAD.
minkowski statement should raise a not implemented warning and not a syntax error. A patch is available. https://github.com/5263/FreeCAD/commit/ ... 98a6ead1d4