In Interstellar (2014), the visual effects team at DNEG, guided by physicist Kip Thorne, developed a C++ program solving Einstein’s equations to accurately simulate the black hole, Gargantua. This code, spanning tens of thousands of lines, rendered thousands of 23-megapixel IMAX frames on a 32,000-core render farm, with each frame requiring around 20 core-hours of computation.
Makes me like the movie even more. Still don't like the ending though.
Here the video abstract from the linked article that was published by Kip Thorne describing the physics behind what they simulated for the movie.