Single stellar population PNLFs depending on the age and metallicity for the fiducial model with different nebular metallicity corrections applied and showing the effect on the PNLFs from circumnebular dust extinction. The structure of the grid and the amount of PNe sampled for each PNLF are the same as in Fig. 7. For the black PNLFs no nebular metallicity correction factor was applied, whereas the colored lines include the corrections by Dopita et al. (1992) and Schönberner et al. (2010). The dotted PNLFs are the same as those shown in Fig. 7 and the solid PNLFs additionally take into account the circumnebular extinction from Jacoby & Ciardullo (2025) as described in Sect. 2.6.