The most common CAD formats are .dwg and .dxf. These formats are proprietary and most often associated with Autodesk and AutoCAD, but other programs also use them. SketchUp subscribers can import CAD files into their models, and export their models as CAD files for use with other software.Importing CAD FilesWhen you import a CAD file, SketchUp attempts to translate the entities in that file to SketchUp entities. SketchUp supports the following imported CAD entities: