Ratio of the linear (black solid curves), nonlinear (blue solid curves), and reconstructed (orange dashed curves) density fields for the 20 selected feature models to the one obtained with a power-law PPS. Each of the rows is respectively for the redshifts marked on the right. The linear O_w(k) are measured from the initial conditions at z = 9, the nonlinear O_w(k) are from the output snapshots of DM, and the reconstructed O_w(k) are from the reconstructed density fields.