=== What You Will Learn ===
In this tutorial you will set up objects with penetrable surfaces to model the walls of a building. You will change the material properties of the building walls and see their effect on the wireless propagation. You will also learn how to run a discrete frequency sweep of your propagation scene.
==Getting Started==
{{Note| Penetrable surface groups have a common wall thickness property, which has a default value of 0.5 project units. The wall thickness is implied and not visualized graphically in the CAD objects of the project workspace.}}
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<td> [[Image:PROPTUT5 4.png|thumb|right|400px|EM.Terrano's Penetrable Surface dialog.]] </td>
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Draw a box object with the parameters given in the table below. The top and bottom sides of a box are capped by default. Here you will uncap the bottom side so that the rays would hit the global ground.
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<td> [[Image:PROPTUT5 5TER_L4_PROP1.png|thumb|500px|The property dialog of the box object.]] </td>
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<td> [[Image:PROPTUT5 6TER_L4_PROP2.png|thumb|570px|The propagation scene including a hollow room with brick walls.]] </td>
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<td> [[Image:PROPTUT5 7TER_L4_PROP2b.png|thumb|670px|TEM.Terrano's simulation engine settings dialog.]] </td></tr></table> <table><tr><td> [[Image:TER_L4_PROP3.png|thumb|670px|The received power coverage map of the propagation scene including a hollow room with brick walls.]] </td>
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