Example of line-profile reconstruction at different line-profile qualities and using our different models. The true Lyα line before passing through the IGM is displayed in red. The IGM transmission curve is shown in pink. The true Lyα line profile is fixed in each row. The observed line profile, after IGM absorption and mocking observation conditions, is shown in black. The observation conditions are fixed in each column as W_g = 0.25 Å, S/N_p = 15.0, W_g = 0.5 Å, S/N_p = 10.0, W_g = 1.0 Å, S/N_p = 7.0, and W_g = 2.0 Å, S/N_p = 5.0 from left to right, respectively. The zELDA prediction for the models IGM+z, IGM-z, and NoIGM are displayed in blue, green, and yellow, respectively. In the bottom of each panel the KS estimation between the true Lyα line profile before the IGM absorption and zELDA prediction is displayed in colours matching the model used.