If, after import into the VE, windows are missing or your geometry appears to be warped, then resetting the coordinates in your Revit model and exporting again will resolve the issue. This particular issue is due to the two software’s having different coordinate systems. Go to “Manage> Coordinates> Specify Coordinates at Point” and click within the model space. The following dialogue box below will appear allowing the adjustments required.
Image from Autodesk Revit: Specify Coordinates Dialogue Box
