Top, from left to right: variation of the vertical B_Z and horizontal B_XY components of the magnetic field strength in the 3D snapshot model throughout the corrugated surface where the line optical depth τ_Δλ = 1, Δλ being the wavelength location of the intensity derivative peaks. Second to fourth rows: maps of the longitudinal B^L (left column) and transverse B^T (right column) components of the magnetic fields obtained by applying the WFA to the synthetic Stokes profiles of the Si I 10 827 Å line, calculated for three cases of spatial resolution. The lower and upper limits of the inferred magnetic fields are indicated at the right side of the respective images. For more information see the caption of Fig. 6.