Unsigned magnetic field distributions. Top: observed Stokes-V amplitude at Δλ =  −0.048 Å in the Fe I 6302 Å line for the subfield. Only a few small magnetic concentrations have signal above the noise. The two major ones near x = 10 have opposite polarity. Bottom: field amplitude in the simulation at h = 0 km, corresponding to spatially-averaged τ₅ = 1 in the continuum at λ = 5000 Å. The field is bipolar, as shown in Fig. 5 of Leenaarts et al. (2010). Throughout this paper image scales are in arcsec, simulation scales in Mm. The two areas have equal solar-surface extent.