The Scattering Object node defines the domains and/or finite voids that make up the scattering object(s). This is a so-called singleton feature that is only added once (per default) to the model. Note that secondary scattering effects are not taken into account if several not connected objects are selected, that is, the scattered field of one object is not scattered of the other objects. The properties of the scattering object surfaces are defined in the Wall sub-node.