What determines which parameters revit exports as element properties to QTO (.dwf format)? I have applied some custom parameters to model elements.... some get transfered to QTO (.dwf) some don't. Also, there are some native revit parameters that get transfered as properties to QTO and others don't. I have exported to .nwc format and all the parameters are aparent in NavisWorks format. I need to see the parameters because that determines how the elements are organized in the catalog.