well, we have to blame SH3D. it is so wonderfully intuitive that with bare manual browsing and internet browsing, I managed to design a full house. that's a compliment, of course. it is true that I missed levels, thinking it would be as intuitive.

the link between roofs and room wasn't clear to me. my barn (carport) now will have an imaginary room.

thanks, keet. back to basics.