For both domes create an in place family by choosing component model in place and then choosing roofs in the family category dialog box.
How to make a dome roof in revit.
After placing the mass an elevation view is needed to adjust the shape of the dome to the desired roof dimensions being careful not to make the roof too steep.
New conceptual mass draw the section open and draw a line for the axis.
Autodesk revit out of the box has an array of different primitive shapes including dome.
1 new family generic model from a front view create solid revolve draw the section select an axis finish load into project roof by face select faces finish roof.
For the onion shaped dome start by using the model line tool to trace the shape from a photograph.
Please like this video.
Get this revit file here.
For the simple curved dome use the revolve and axis line tools.
For glazed domes based on curtain walls only the second does.
In this video i show you how to model two types.