Example of TGE extinction estimate in a simulated Galactic field at (l,b) = 60°, 10°. The black points show the true extinction, A₀, for all stars in the field, while the diamonds show the estimated extinction from GSP-Phot for the selected tracers, coloured according to the magnitude of the uncertainty of the A₀ estimates: red for | ΔA₀| > 0.1, green for | ΔA₀| < 0.1, and blue for | ΔA₀| < 0.05 mag. The solid horizontal line shows the estimated A_TGE value and the dashed lines the ± 1σ rms.