Illustrations of the priors used for the ${\langle B_{\Vert }\rangle }_{{\text{L}}_{\text{gal}}}$ , DM_gal and ${\text{L}}_{{\text{DM}}^2/\text{EM}}$ sky models. The right side shows sky maps corresponding to four different samples drawn from the respective prior distributions. The left side shows histograms of the same prior samples, and additionally a line summarizing the distribution of values over 100 samples. The histograms were normalized to unity to ensure comparable scales.