# Specify a name for the surface group and select a color or texture.
# The properties of a penetrable surface are identical to those of an impenetrable surface, plus an additional thickness property.
# By default, a brick wall with a thickness of 0.5 units is assumed. You can change the '''Thickness''' of the penetrable surface as well as its '''Permittivity''' eε<sub>r</sub> and '''Electric Conductivity''' sσ.
# Click the '''OK''' button of the dialog to accept the changes and close it.