Example of a case in which both the P - λ and the θ - λ profiles deviate from Serkowski expectations. We were able to fit both profiles by introducing a 2-Cloud model. Data from Bagnulo et al. (2017) for HD 93222. Left: extinction vs. distance profile taken from the 2kpc version of the map by Edenhofer et al. (2024). The vertical red line corresponds to the distance of the source. Middle: data in the P - λ space, together with three fit models. Solid black line: Fit using Eq. (1) in P - λ space only. Dashed blue line: Best-fit 1-Cloud model in the q - u space (Eq. (6)). Dash-dotted red line: Best-fit 2-Cloud model in the q - u space (Eq. (6)). Dotted orange lines correspond to the two individual components of the 2-Cloud model. Right: data in θ - λ space together with the three models and the individual components of the 2-Cloud model. Parameters of the fits are quoted in Table 2.