Due to complexities in the way that geometry is created in Rhino and that layers are used, compared to how Revit identifies elements, it is often best to import a Rhino model and use the outline to create a Revit model around this. There are also third party applications which can assist in the successful transition from Rhino to Revit. FenestraPro does not currently convert/translate non-Revit format models for use in Revit.
