Example variations with semi-major axis of axis ratio (top) and position angle (bottom) from hydro-simulated, observed, and custom-designed galaxies. The "Hydro-simu 2" curves depict the morphology of an ellicular galaxy, i.e., an early-type galaxy displaying a medium-sized disk component in the center. The position angle profiles are translated by a constant angle to help visualization. The corresponding convergence maps are also shown in Fig. A.2.