Probability distribution functions (normalized to unit area) of the continuum intensity contrast (bin size 0.01) from MHD simulations (solid curves, corresponding to the green curve in Fig. 3) and observations (dashed curves, corresponding to the red curve in Fig. 3). The upper left panel shows the PDF for all pixels, while the plots in the other panels give the PDFs for various ranges of B_LOS (indicated by the insets) obtained from inversions, omitting the pixels corresponding to pores.