Take 3D drawings and data (WoW, Second Life, etc..) and plop them inside Google Earth – “Maya2GoogleEarth is an open-source, cross-platform tool developed at Eyebeam for exporting 3D models from Maya into Google Earth. Once installed, it allows you to export 3D models from within your scene as a single Google Earth Placemark (KML) file. The project was inspired by the Open GL extraction utility OGLE which can extract 3D data from openGL programs like Google Earth. We thought that it would be fun to be able to take the extracted 3D data, remix and add to it and then load it back into Google Earth.” Link.
Add your own 3D data to Google Earth