
130 Game Development and Simulation with Unreal Technology
off of physical objects in th e real world. This co ncept was revealed in SIGGRAPH
2013 [55].
Unreal Engine 4 is a unique game engine in this regard, as it takes the approa ch
of digitally simulating light behavior in a realistic manner. This allows for materials
to work equally well in multiple lighting environments, instead of being specifically
designed for specific environments.
CROSS-REFERENCE
This model of material and ligh t interaction is new to Un real Engine 4. To
learn more about the Physically Based M aterials, please see Section 5.6 of
Chapter 5– A dvanced Material Concepts In Unreal ...