The Keyhole Markup Lanuage (KML) is a popular format for distributing GIS data and models. KML files are usually small enough to email, and they can be opened in a variety of free viewers. KML is an option when exporting models from CityEngine. You may find that the models are not being displayed in the expected orientation when viewed in Google Earth.
ArcGIS and Google Earth store and interpret KML files differently in that the Google Earth version is rotated by 180 degrees. Because of this rotation difference, you will need to use one of the export presets based upon the software that will be used to view the data.
The Google Earth option sets a heading correction of 180 degrees. This allows the model to display correctly. Keep in mind though, if you apply the Google Earth preset, the KML will not display correctly in ArcGlobe.
Timothy H. – Raster/3D Support Analyst