In the ideCAD Architectural, the project or part of the project is saved as 3ds extension with the 3DS (Export) command.
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.
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.