We deal with a project only in IFC model and we don t have other files. The procedure to this is long because in a project of hundred or more objects of frame I have to change the materials for each and export for a 3d view model on the web page. The fact is that is not possibile to do quickly because importing in RVT there is no way to avoid Edit in place mode of Objects...so each material is different inside the edit in palce mode and has to e retreated.. how is possible to modify them quickly?