The complete figure set (12 images) is available in the online journal.

SHAPE wire frame models of: (a) M 3-30, (b) Hb 4, (c) IC 1297, (d) Pe 1-1, (e) M 1-32, (f) M 3-15, (g) M 1-25, (h) Hen 2-142, (i) K 2-16, (j) NGC 6578, (k) NGC 6567, and (l) NGC 6629, in the top view (i = 0°; first column), the front view (i = 90°; second column), and the best-fitting inclination and orientation (third column; see Figure 5 for an interactive viewer online), followed by the rendered image (fourth column), and the associated archival imaging observation (fifth column), respectively. The parameters of the best-fitting models are listed in Table 4. The archival data include the HST images of Hb 4, Pe 1-1, M 3-15, M 1-25, Hen 2-142, NGC 6578, NGC 6567, and NGC 6629, with the instruments and filters/gratings listed in Table 2; and the narrowband Hα+[N II] filter images of M 3-30, IC 1297, M 1-32, and K 2-16, taken with the 3.5 m ESO NTT from Schwarz et al. (1992), with the image scales shown by solid lines. North is up, and east is toward the left-hand side in each archival image.