Integrated polarization angle over surfaces of constant impact parameter (b) for an image of a jet with i = 17°. The result shows a strong spin dependence and captures the effects of aberration as it slows down the EVPA evolution with distance from the BH. The solid curves correspond to γ_∞ = 2.5, thus tracking the windup along the receding edge of the jet. The transparent curves correspond to γ_∞ = 4.0, thus tracking the windup along the approaching edge of the jet.