Yes it's the workflow ;)
http://www.incendia.net/wiki/index.php/The_Baseshape_Editor (Special Baseshape)
http://www.incendia.net/wiki/index.php/Baseshape_Types (Number N°58 ! )

But I have some problems with my old computer, the rendering section makes at each time total crash!
Have you some problem with renders?