- Select all masses, Group, and then Save as Library - Group
- Open the RVT from step 1
- R button - Export - Export Options - IFC Options
- Set Mass and sublevel Form to IfcBuildingElementProxy (copy-paste from another field)
- R button - Export - IFC
- R button - Open - IFC
- Your new file has all the same Forms, but instead of being Masses, they are now of Generic Model category. You can copy-paste them back into the original file, and either delete or hide the original Masses.
Thursday, August 9, 2012
Quite simple really. These steps were tested using Revit 2013.