Spectral curvature value based on different column densities, displaying some of the configurations adapted from Fig. 3 of Koss et al. (2016). Each curve represents how the SC value changes with N_H based on different input parameters used in the MYTorus model simulations. The red circles show the curve when the SC equation is calibrated to Swift-BAT data, while the blue triangles show the different SC equation when calibrated to NuSTAR data. The dashed gray line indicates the cutoff for CT-AGN determined by Koss et al. (2016). Both lines illustrate how the increased curvature of the hard X-rays of AGN is related to an increase in column density.