April 24, 2021 at 1:40 amKyleAnsys Employee
By default, the background material in FDTD and MODE simulations is vacuum, with a constant refractive index of 1. This is the refractive index used in the simulation for regions where there is no geometry object. In the FDTD, FDE, varFDTD and EME solvers, this can be changed with the background material setting of the solver objects. This setting is found under the General tab of the solver object's edit dialog. For example, in FDTD: Any material from the Material Database that can be used for a 3D object can be chosen for the background material. If the "
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