
2
III
Deferred Normalized
Irradiance Probes
John Huelin, Benjamin Rouveyrol, and
Bartlomiej Wro´nski
2.1 Introduction
In this chapter we present deferred normalized irradiance probes, a technique
developed at Ubisoft Montreal for Assassin’s Creed 4: Black Flag.Itwasdevel-
oped as a cross-console generation scalable technique and is running on all of our
six target hardware platforms: Microsoft Xbox 360, Microsoft Xbox One, Sony
Playstation 3, Sony Playstation 4, Nintendo WiiU, and PCs. We propose a par-
tially dynamic global illumination algorithm that provides high-quality indirect
lighting for an open world game. It decouples stored irradiance from