3ds to kmz conversion is used for export of 3ds Max content to Google Earhs KMZ format and you have plenty of choices for this. Most, if not all, Autodesk software nowadays support export to KMZ/KML formats, but it depends on the nature of the .3ds content.
Except for Autodesk software, numerous alternative tools, such as Blender, are also a viable option how to convert 3ds to kmz.