Intrinsic position angle of RS Oph after the 2021 outburst. Aside from the 180° position angle around the Hα region on day 2, the position angle of the intrinsic polarization is, on average, 90°. This implies that the scattering region that produced the observed polarization was oriented perpendicular to the elongated structures observed at other wavelengths during the last two outbursts. The data were smoothed with a moving average over seven points to better illustrate the position angle structures.