One of the Interstellar developers responded back to me and is now aware of your work. Here is the paper you refer to in case others want to read it also:
O. James, E. von Tunzelmann, P. Franklin, and K.S. Thorne, "Gravitational lensing by spinning black holes in astrophysics, and in the movie Interstellar", Classical and Quantum Gravity, 32, 0650001 (2015). http://stacks.iop.org/0264-9381/32/065001
There are also a number of videos of gravitational lensing of star fields by a spinning black hole at this website.