Curved walls are a hot mess. They're driving my OCD insane. I thought I had them figured out but noooo another glitch appeared. I never had the buckling floors or ceilings issue. Instead I get a sharp white line from the curved wall to the curved balcony that will not go away. I ended up having to delete the entire lot and start over.
Also, I like to build with the box tool. I could do single walls but eh, why do the extra step? You have to place the boxes in a particular order otherwise you get an error that the box can't go against the curved wall box. OH! And the flooring? Try a zero elevation lot with a curved err... what's it called? The zero elevation balcony on the first floor (English is not my birth language and sometimes words escape me). Anyways, that room to the area outside it? I had to use the paint tool because I could not place the sidewalk in front of that porch area. It had giant gaping open spots of the default grass showing through.
I really should get an image hosting service so I can show these things instead of trying to explain them.
I'm done with curved walls. I went back to octagonal ones till they figure this out and it doesn't act so off.
And I've been building since 2015, I consider myself an experienced builder who recreates things she sees in real life that she finds interesting. So, this isn't a novice builder issue. I also refuse to use MOO. So, I can't overcome these issues like many of the builders on the gallery are doing because of their MOO usage.