We perform general relativistic ray-tracing simulations in the Kerr spacetime of photon packets from a lamppost corona illuminating an accretion disk extending from ﹩r={r}_{\mathrm{ISCO}}﹩ to ﹩r=100\,{r}_{{\rm{g}}}﹩ and prompting the emission of Fe Kα photon packets (left side of diagram). The latter are tracked until they reach a coordinate stationary observer at r_obs = 10,000r_g (right side of diagram). Assuming a flat Minkowskian spacetime, we back-project each photon packet to a source plane at 10,000r_g from the observer based on its wavevector ﹩{\check{k}}^{\mu }﹩ in the observer’s reference frame. The rays enter the subsequent analysis with a weight depending on the gravitational lensing magnification at the back-projected origin of the photon packet.