Comparison between the B_LOS values obtained in the sunspot penumbra (same time step as in Fig. 7) using the WFA and DeSIRe inversions. Left column: results from the WFA applied to the line core (top) and to the wings (bottom). Central column: inversion result at log(τ) = − 4.9 (top) and log(τ) = − 3.3 (bottom). Right column: density plots comparing the values from the two methods. We consider only penumbral pixels where χ² <  3 is obtained with both methods. White dashed lines are regression lines.