In the architectural program, you can save your project or project part with the 3DS export command, with a 3ds extension.
Location of 3DS Export Command
You can access it from the menu under the ideCAD logo in the upper left corner of the ribbon menu.
Usage Steps
Click the ideCAD icon/Export/3DS icon in the ribbon menu .
The export 3DS dialog will appear.
In the dialog, switch under an appropriate folder and give a file name and click OK .
When the saving process is completed, the "3DS export is completed." warning will appear on the screen.