...sunken rooms
Not entirely sure how such a function could be easier than just creating a level. If you think about negative elevation for objects, this has been proposed but I had the impression that Puybaret has yet to be convinced ... ... steps are curved, ...option to define curves for room boundaries.
Curved steps / stairs can be defined in the Furniture Library Editor so they cut the floor (and ceiling) perfectly. This guide tries to explain how. ...it's an absolute delight! 
What impresses me the most after 9 months of amateur use, is how every constructional challenge finds a solution in SH3d (or at the very least a workaround) - usually described somewhere in the FAQ or the forum. And given the ease of use, that is quite remarkable. ok
