Every pixel fires a photon backwards through curved spacetime: the exact Schwarzschild null-geodesic equation, integrated per-pixel with RK4, bends each ray around the hole — producing the shadow, the photon ring, and the lensed far side of the accretion disk with no tricks. Drag to orbit, scroll to approach, and switch presets to see Sgr A* or M87* at the angular size the Event Horizon Telescope actually measured.
Schwarzschild (non-rotating). Geodesics integrated per-pixel — the bending you see is the real null-geodesic equation, not a screen-space warp.