{{Note|You can import external CAD models to CubeCAD only. From CubeCAD you can move objects to other modules like [[EM.Terrano]].}}
While in CubeCAD, select the menu item '''File → Import...'''. The Windows Open Dialog opens up. From the '''File Type''' drop-down list, select STL. Use the Windows Explorer to go to the folder where your STL file was saved. Select "Random_City1.STL" and click the {{key|Open}} button of the dialog. Your urban canyon scene appears on the screen in grey color. When you import a very large object, it may full up the entire screen. You can zoom to fit your structure into the screen using the keyboard shortcut <b>Ctrl+E</b> or by clicking the Zoom Extents [[Image:fdtd_zoomextents.png]] button of View Toolbar.
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