Emmanuel,

thanx for your clearification [:(]
Unfortunately, i just stopped my tries to import an .obj file (which is the only one exported by sh3d) into cinema4d. the resulting scene is far away from being usable as every single sub-object is splitted up into non-hierarchy chaos - (not sorted 4000+ objects for my actual plan). oh, and the materials are lost.
so, to further go with this i would have to separate every single object and save it - e.g. group some walls and save it etc.. but this is gonna take alot of time....
i think wavefront obj is not in every case the best export format (i can open it in aoi but export ends in another one way road.).
next, i give blender a shot (gotta download it yet.)
so there is hope, isn't it [:D] ?