Diagnostic plots for the DG-filter. Final selection, with all non-red points from Fig. A.8 plotted on a smaller scale (−0.01 to +0.02 mag). Scale height also additionally colour coded (H = 10 pc, black circles; H = 800 pc, green triangles; H = 2000 pc, blue squares). The bottom panel shows the bias divided by the error bar. Larger simulations have only been run for the smallest scale height.