I don't have AC 15 with the fantastic new shell tool so if I've got to do some complex shapes, (mostly objects - I don't do blobitecture) the fall-back is old SketchUp. Of course there will be lots of polygons and the process is cumbersome but beggars can't be choosers.
http://forums.sketchucation.com/viewtopic.php?t=28586
Have a look at the videos to see what the tool can do.
http://forums.sketchucation.com/viewtopic.php?t=28586
Have a look at the videos to see what the tool can do.