Correlation functions, r_pw_g+ (top) and $r^2{\stackrel{\sim }{\xi }}_{\mathrm{g}+,2}$ (bottom) in TNG300 for two shape samples: n_★ > 300 (downward triangle) and log(M_★ h/M_⊙) > 10.5 (upward triangle). The shapes are projected over the x (light blue), y (medium blue) and z (dark blue) axes and measured using the simple inertia tensor, whereas the joint NLA fit is shown as a solid (dashed) line for the cut in n_★ (M_★). The second panel in both plots shows the fit residual for the y-projection. Grey regions indicate excluded regions for the fit. Note: the data points are slightly horizontally displaced for easier readability.