[[Image:prop_manual-12_tn.png|thumb|500px|An imported external terrain model.]]
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=== Importing & Exporting Terrain Models ===
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You can import two types of terrain in EM.Terrano. The first type is "'''.TRN"''' terrain file, which is EM.Terrano's native terrain format. It is a basic digital elevation map with a very simple ASCII data file format. The resolution of the terrain map in the X and Y directions is specified in meters as STEPS. The (x, y, z) coordinates of the terrain points are then listed one point per line. The other type of terrain format supported by [[EM.Cube]] is the standard '''7.5min DEM''' file format with a '''.DEM''' file extension.
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To import an external terrain model, first you have to create a terrain group node in the Navigation Tree. Right click on the name of the terrain group in the Navigation Tree and select either '''Import Terrain...''' or '''Import DEM File...''' A standard [[Windows]] '''Open Dialog''' opens up, with the file type set to .TRN or .DEM extensions, respectively. You can browse your folders and find the right terrain model file to import.
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You can also export all the terrain objects in the project workspace as a terrain file with a '''.TRN''' file extension. You can even import a DEM terrain model from an external file and then save and export it as a native terrain (.TRN) file. To export the terrain, select '''File''' > '''Export...''' from EM.Terrano's '''File Menu'''. The standard [[Windows]] Save Dialog opens up with the default file type set to '''.TRN'''. Type in a name for your new terrain file and click the '''Save''' button to export the terrain data.
=== Moving Objects among Block Groups ===