Implementing Probabilistic Connections for Bidirectional Path Tracing in the Mitsuba Renderer

Nikola Dodik

Supervisor(s): Hiroyuki Sakai

TU Wien

Abstract: Light transport simulation algorithms are remarkably adept at recreating a variety of light phenomena which occur in nature. As such, they have seen widespread adoption across the industry, which made it paramount to create efficient and robust algorithms. Probabilistic connections for bidi- rectional path tracing (PCBPT) represents one such recent algorithm. Unfortunately, no implementation of PCBPT was publicly available, which is why we implemented it into the open-source renderer Mitsuba 1 . We evaluate the algorithm against standard bidirectional path tracing on a variety of different scenes. Our comparisons provide in- sight into the type of scenes for which PCBPT can provide an improvement and we examine cases where the additional computational cost presents too much overhead.
Keywords: Physically-based Rendering, Rendering
Full text:
Year: 2018