Comparison of vertical slices through the Y = 0 Mm plane in the original model and in the model resulting from the 3D inversion. The left panel shows the magnetic field lines and the density in the original model, and the right panel shows the same quantities in the inferred model. The background color in both panels represents the log-density of Mg II ions. Our 3D Stokes inversion successfully captures the essential morphology of the original model.