Angle map and intensity contour for edge-on inclination. The two panels show a map of the values of the emission angle i for both spins at edge-on inclination. Overplotted is one specific intensity contour in red, encompassing 90% of the total specific intensity emitted at the surface of the disk. The beaming effect is already clear at spin zero: more intensity is emitted on the left part of the image where matter moves toward the observer. The beaming effect is extremely strong at high spin, and only a very small part of the disk emits most of the radiation observed.