I have exported a Vectorworks building into 3DS file and then imported into Sketchup. I have then brought in our local town geolocation and then viewed in Google Earth. I have terrain turned on
First of all, when I Geolocated the building on the surface of the earth in Sketchup, it imported floating in the air in Google Earth. I then relocated the building underground and it shows up better on Google Earth BUT as I move around the building in Google Earth the building popups up and down about 10 feet.
I have imported other 3DS buildings from the 3D warehouse and they worked fine.