Effects of the maximum dust grain size, a_max, on the radiative transfer results at 0.87 mm, 1.3mm, and 3mm, with the fixed parameters of f_high−J = 1 and L_★ = 20 L_⊙. Each column is one radiative transfer run of POLARIS, with a_max = 0.5, 2, 10, 30, and 50 µm, while each row corresponds to a wavelength of observation for the radiative transfer, i.e., 0.87 mm, 1.3mm, and 3mm, as indicated on the first plot of each row. We only show the polarization fraction.