I mean I figured they would be abit glitchy to put together much like the curved fences so I was expecting problems with platforms and joining walls but wow....they are so much more of a struggle then...
@bshag4lv go to build mode, hit the B key, choose any of the three "rounded room" options @julienrob2004 straight walls fit best if they are in the places that cut the circle in half or quarters. so far it seems easiest to use if you start with the straight walls that appear when you first place the rounded room, and then grow/shrink/combine rooms to your liking before deleting whichever straight walls you *don't* want.