Polarization angle in degrees, measured relative to north, as well as maps at λ = 228.5 nm for two simulations of an emitting spheroidal source inside an isotropic, homogeneous spherical dust medium. The optical depth, τ, of the medium of the simulation on the right is five times greater than that of the one on the left. This results in more multiple light scattering before it reaches the LOS, leading to randomization of the polarization angle pattern and depolarization.