Maps of log(β) (top row) and log(B_eq/B) (bottom row) at the continuum formation height (τ₅₀₀ = 1) for different simulation runs. The red (top) and green (bottom row) contours mark the UP boundaries defined at . The black contours mark the position of the outer sunspot boundaries and the mean position of the UP boundaries that are defined for the purposes of azimuthal averaging (see Fig. 5). The red dashed lines through the middle of the spots mark the position of the cuts shown in Fig. 8.