while exporting revit models to google earth via globe link, I discovered a strange behaviour when the target aerea is not flat. (pic_1)
this is caused by the "relative to ground methode" used in the exporter to calculate the geometry z-coordinate.
looks like deconstructivism, but I guess this is not the intention of the inventor.
exporting through autocad's google earth extension (labs.autodesk.com) keeps the model upright. (pic_2)
this methode uses an enapsulated collada file.
but with this approach you don't have access to the materials of the model inside google earth anymore.
hopefully a combination with the best of both exporters will make it soon into revit.