Hi, I have been able to export simple building models from Revit for analysis in butterfly on rhino/grasshopper. There always is an element of cleaning and simplification required which for basic geometry is straightforward. Lately we have been getting much more complicated revit models and it takes a crazy amount of time to prepare these for CFD. Is there a way to create a manifold version of a revit model or with some sort of addon? Like an export building mass function?