Top panel: visual extinction (A_V) as a function of the distance of stars within 2 kpc of the Sun. The extinction and distance values are derived from the StarHorse catalog. Lower panel: polarization percentage as a function of the distance. A vertical dashed line at 154 ± 15 pc marks the distance of the Snake filament. The error bars represent the uncertainties in the extinction and polarization measurements, scaled by 50%. The purple line represents the mean value in bins of 100 pc, with the light blue shaded area indicating the ±1σ uncertainty.