Orientation- and realization-averaged P_r as a function of wavelength. The upper and lower rows show results for BA and BAM2, respectively, whose geometry is visualized on the rightmost side of the micrometer scale. The left columns display outputs in the standard composition (m_r = 1.6 and m_i = 0.1), while the right columns show those with a lower absorptivity (m_i = 0.01). Errors indicate 1σ for the four realizations of the clusters.