Line ratio profiles for ESO 157−49 model with 2% Φ_OB. The dots show the observed values, colored according to the η-parameter going from blue at low η to green at high η. The size of each dot is relative to the size of the corresponding Voronoi bin. The red curve shows the model predictions. This model predicts the [O I]/Hα line ratio well, but fails to predict any of the other line ratios. The log U₁ = −4.51 and other parameters are same as in the best fit model.