Atmospheric layers probed by the photons in our radiative-transfer computations. Layer 28 is the top of the atmosphere and layer 0 is the bottom (see Carrión-González et al. 2020 for details). Each row corresponds to a cloudscenario. Upper row: no-cloud; middle: thin-cloud; bottom: thick-cloud. Left column: phase angle of 37°; middle: α = 85°,right: α = 123°. The maximum photon contribution at each wavelength is normalized to 1. However, not all wavelengths have comparable absolute contributions to the spectra, as shown in Fig. 1. The right-hand panels of each subplot show the vertical profiles of these normalized photon contributions for a selection of wavelengths: 500 nm (purple lines), 600 nm (blue lines), 724 nm (yellow lines), and 884 nm (red lines).