Pseudo-signals created by stellar surface heterogeneity shown in comparison to the observed ingress, mid-transit, and egress signals. The transit over dark patches creates pseudo-emission (orange solid lines), and a transit over bright patches creates a pseudo-absorption signal (blue dashed lines). Between the two extremes is the possible range of pseudo-signal contribution to the observed signal (green shaded areas). The gray dotted line indicates the impact of the RME neglecting stellar surface inhomogeneity.