Gravitational lensing of an earth-textured sphere by a Schwarzschild black hole, producing multiple images
Raymarching in the Schwarzschild spacetime with an earth-textured sphere near the black hole. The extreme spacetime curvature distorts the image of the earth through gravitational lensing, producing multiple images and Einstein ring arcs. Null geodesics are integrated numerically in the Schwarzschild metric.
Controls: WASD to rotate, arrow keys to translate.
