Thank you for your input !
I just played around with this new toy few hours and solved the exporting .obj without floor from another your post:
http://www.sweethome3d.com/support/forum/viewthread_thread,1331_offset,10
Maybe a good start. I noticed a "strange" dark on the top of plasterboard (the one above the armchair) not uniformly illuminated. Are there any light plugins or something similar to create a good illumination ?
Thank you !
