3D Illustrator Question:

Adobe Illustrator has already plenty of tools and features, but advanced users will always find something new and more so plug-in helps to solve their various problems. Plug-ins help to create designs in a more advanced and beautiful way. Plugin means to add a specific feature to your software or an application. Plug-in applications can easily be installed on your computer.
Example: CAD Tool 9
This tool adds Cad tools (Architectural Swatches) to the Illustrator Tool box. With the help of this tool, we can make Architectural designs.