Schwarzschild BH viewed from the same position, but with different velocities. The accretion disc is tilted by 20° and spans from the photon sphere at r=3 to r=5, the observers are at r=6 (in GM/c²). The color code for the frequency shift ranges from F/f=0 (black) over F/f=1 (white) to F/f=2 (magenta). FOV: 360°×180° in equirectangular projection. The shifted apparent positions are due to the effect of aberration and relativistic beaming. For more explanations click on the images raytracer.yukterez.net