Logarithmic scatter-density plots of the electric current density from the MHD simulations (horizontal axis) and the values inferred by the me Stokes inversion (vertical axis) at τ_c = 1 (lower panels) and τ_c = 0.1 (upper panels). From left to right: logarithm of the absolute value of the ∥j_x∥ component of the electric current density, logarithm of the absolute value of the ∥j_y∥ component of the electric current density, logarithm of the absolute value of the ∥j_z∥ component of the electric current density, and logarithm of the absolute value of the modulus of the electric current density, ∥j∥. The horizontal dashed black line represents the so-called floor value, below which the Stokes inversion is not capable of correctly inferring the electric currents (see text for details). The solid thick diagonal corresponds to the one-to-one retrieval along which the Stokes inversion perfectly retrieves the electric currents. All pixels in the selected region described in Sect. 2 are included in this figure.