Michael,

Interesting, the file is way too big to email but the file came from Rhino with lots of annotations (which didn't show up in MOI3 but did in MOI4). When I exported the geometry to its own file it looks fine. Incidentally, the the file was produced in Rhino6, saved as a Rhino5 and its been doing some various weird things when I open the file. I would be happy to upload it to a dropbox or something if you still want to see it.