Reflected light (first row) and polarized light (second row) spectra showing the influence of the 3D CG approach applied to the ERA5 reanalysis data for the clouds compared to the ERA5 data themselves (black line). The 3D CG was run assuming different vertical overlap schemes: EXP-RAN and MAX-RAN and different zoom-in factors (×3 and ×5). The different columns refer to spectra at different phase angles α: 60, 90, 120°.