Magnetic flux distributions. Flux-based probability density functions (solid lines, left axis) and corresponding empirical distribution functions (dashed lines, right axis) as a function of |B_z| at z = 0 (left panel) and τ_R = 1 (right panel) for the four models during phase 3. The insets in the top left corners of the larger panels display zoomed-in images of PDF_Φ at high magnetic field strengths.