Results for the surface brightness distribution along z for R = 2, 6, 9, 10, 11, and 12 kpc when the profiles are stacked together at 15″ to form a composite z-profile. Similar to Fig. 10, here also the profiles deviate from each other. The deviation is larger at smaller z because the profiles are stacked at a higher z value. If the profiles had the same disk thickness, they would essentially be superimposed on each other and form a single curve.