Hi, thank you for the Revit plugin. Things look quite good so far!
I noticed a problem trying to export room volumes from a Revit model.
The room I want to export is hatched in light blue. The shafts highlighted with dark blue get exported as punctures in the room volume, but the shaft marked in orange does not. It is instead exported as a part of the room. I am not sure if I am doing something wrong.
I imagine you are using an older version of the Rhino plugin for visualizing the geometry. Can you install the latest version of the Rhino plugin and try again? I believe that should resolve the problem.