Roughness is incompatible with polarized simulation
Current implementation of scattering from rough interfaces works only for scalar fluxes.
Reported by Liz Margarita Montanez Huaman.
In hotfix 20.1, failed assertion has been replaced by runtime_error (Sim/Contrib/RoughMultiLayerContribution.cpp
, line 53s.).
Edited by Wuttke, Joachim