Funny thing at the opposite of Moi ;)

 From:  Frenchy Pilou (PILOU) 7 Oct 2014  (39 of 2688) 
4446.39 
A Possible workaround :)
MagicaVoxel
Import inside Sketchup as OBJ or 3DS
Cleanup By Thomthom
Export as OBJ By TIG
_importObj By Max Smirnov inside MOi
Explode - Boolean Union

EDITED: 8 Oct 2014 by PILOU