Extinction–distance profiles for four PNe with single jumps in the top row and multiple jumps in the bottom row. PN names are labelled at the lower right of each panel. Distance (in kiloparsec) vs extinction E_GBP,GRP (in magnitude). The source colours are the same as those in Figure 1, and the solid black lines show the fits obtained with our extinction-jump model. PN positions are shown with vertical dashed black lines. The grey points represent ZG25 stars, and the dashed green lines indicate G19 curves. PN distance constraints are shown as diamonds with error bars from GS21 (light green), CW21 (orange), HJ24 (yellow), and F16 (blue). Conventions are consistent throughout.