Now you can use AC3D's excellent modelling capabilities to create whatever you desire, from buildings to curved organic objects and then export your models for use in Google Earth.
Creating your models
For Google Earth models, use one AC3D unit(one large grid square) to represent one meter.
The following image shows the dinosaur that comes as a sample model with AC3D. It has been enlarged to around 30 meters tall by pressing the 200% button on the toolbar a few times (the size can easily be read at the top right of the AC3D window when the object is selected). The dinosaur has also been positioned so that it is sitting on top of the zero Y plane. This ensures that it will sit on top of the land at the location specified in Google Earth.
Models can be colored and/or subdivided. Textures are not supported in kml files and will not be exported.. Only polygons will be used; any lines or polylines will be ignored.
Exporting to Google Earth
From AC3D, select FIle->Export->Google-Earth-KML. A dialog box will appear.
The Latitude and Longitude specify the location at which the model will be placed. This can be read from Google Earth, usually at the bottom left of the window. Google Earth can display location in a number of different formats. If it is not displaying Lat/Long in decimals, use the settings within Google Earth to change this.
The Altitude specifies the height above the ground that you want your model to be.
The Rotation is the number of degrees of rotation for the orientation of the model. If this is 0.0, the model will face North. The values may be positive or negative e.g. 90.0 (East), -90.0 (West), -45.0 (North West).
The Name is used within the KML file to identify the object. It will show when Google Earth loads the model and lists it in the set of available places.
After pressing OK, save the file.
Loading your AC3D model into Google Earth
In Google Earth, select File->Open and select the file you just saved. Google Earth will place the 3D model and fly you to its location.
By adjusting the rotation and position, it is possible to align buildings over specific locations in Google Earth e.g.:
Note that the model loaded into Google Earth will only be visible to you. To make this visible to others, it needs to be uploaded to Google's 3D Warehouse.