AuthorsThomas M�ller (Disney Research Zurich, ETH Zurich)Marios Papas Disney ResearchMarkus Gross Disney ResearchWojciech Jarosz (Dartmouth College)Jan Nov�k Disney Research We address the challenge of efficiently rendering massive assemblies of grains within a forward path-tracing framework. Previous approaches exist for accelerating high-order scattering for a limited, and static, set of granula