The black hole in Interstellar was made by following rays of light through Einstein's curved space, one pixel at a time. This demo does the same in your browser, live: fly around the hole, then switch on the two effects the film left out on purpose, the gravitational redshift and the Doppler shift that makes one side of the disk blaze and the other fade.
This article and its interactive demo were created with the help of generative AI and editorially reviewed.