Four geodesics corresponding to the same screen pixel for a Kerr (blue; integration stopped when approaching the event horizon), boson star (green for the k = 1, ω = 0.77 boson star considered in this paper; black for a more compact k = 1, ω = 0.7 boson star), or Lamy (red) spacetime. The selected pixel is one of that forming the crescent-shape highly lensed feature visible on the bottom left panel of Fig. 11. The arrows represent the direction of backward-in-time ray-tracing integration. The observer is thus at a large negative value of z. The disk inner radius in all cases is at r_in = 6M.