Dependence of the pulse profile of SMC X-3 on energy in two NuSTAR observations. Different panels correspond to different X-ray luminosities: a) L_bol = 10.2 × 10³⁸ erg s^-1 (ObsID 90201035002), b)L_bol = 1.9 × 10³⁸ erg s^-1 (ObsID 90201041002). Different energy bands are shown with different colors (shown on the right). The profiles are normalized by the mean flux in each energy band and plotted twice for clarity.