SweetHome3D is a great tool, thanks to its developers. My problem was that I expected the existence of this feature and made some drawing, assuming that these decorative changes could be made later. Would be nice, if it appeared in some future releases.

Another thing I have discovered, is that if ...

This feature was in 3D Home Architect by Broderbund Software (1993 for Windows 3.0 :). And actually it helped very much. For example, most houses are more or less rectangular in their basic layout. So I start with a rectangle, which I can measure precisely, with a given wall thickness. But my house ...

Is there any way to break either the wall or the connection point between two walls? I made a basic shape for my house with exact measures, but it has more complex layout actually. An old 3D Home Architect software I used more than years 10 years ago allowed breaking the wall, but I couldn't find ...