Have you ever tried to view your rooms in Revit in a 3D view? You cant do it.
Its free and easy to use.
Its ridiculously easy to do. Simply follow the steps below
Download dynamo here or if you already have it click on the "addin" tab
Once dynamo is open
Cant find them? type the names in the search bar
drop down these 3 nodes as shown and wire them up....
(Catergories,All Elements of Category, Element.Geometry)
Then Click Run
....a 3D view of your Revit Rooms!!!!!
If you dont know anything about Dynamo it does not matter just follow the steps above.
If you are worried that you may change the Revit model then it does not matter because Dynamo will show you the rooms and NOT change the Revit model
If you are asking if it is really that easy to show the Rooms in 3D then the answer is yes its really that easy.