Interesting video on AutoCAD Exchange over at this link.
The main point of the video is – if you want to work with Solids in AutoCAD effectively, you should correctly set the DELOBJ system variable. What does this variable mean?
From Autodesk online help:
It seems that this workflow is becoming easier. Of course, Revit itself is becoming a more powerful 3D modeling tool. Check out my post on Bending the Rules with Adaptive Points.