Interoperability with ARCHICADARCHICAD exports the model in the Artlantis file format through its dedicated plug-ins. You can transfer the geometry, textures, perspective cameras, the sun, lights and layers. The plug-in offers you the possibility to update your second Artlantis file and take over the settings from the first one in case you need to change anything in the ARCHICAD model.
The Artlantis export plug-in is installed by default in ARCHICAD. You can find more specific information about the plug-in and a tutorial here.