Illustration of the continuum polarization at 5000 Å normalized to the blob optical depth and shown forinclinations between zero and 180 deg, with the model aged to 200 d. The simulations are characterized by various values of the electron density enhancement associated with the blob (see label; the corresponding blob radial optical depth increases from 0.044, to 0.109, 0.436, and 2.178 for increasing N_e,fac). The dashed curve shows the prediction of Brown & McLean (1977), scaled by a factor of 0.75, using the characteristics of model op10-nefac100-v4e3-dv1e3 (green curve).