Here's Jaroslav's description of his presentation:
“Computer-generated images have become a natural part of our lives, and 3D printing technology is maturing and becoming more widespread. In this talk, I’ll show how these two seemingly unrelated topics share the same basis: accurate simulation of the behavior of light. The fascinating origins of this computational problem can be traced back to the development of first nuclear weapons in the Manhattan project, and to names like von Neumann, Fermi, and Ulam.”