PureHair
PureHair is Crystal Dynamics and Square Enix's hair rendering technology, which like our own HairWorks technology adds tens of thousands of hair strands to a character model. These hairs act realistically, swaying and moving in concert with character movement, and can be affected by water, wind and snow, and are lit and shaded in real-time by the scene.
In Rise of the Tomb Raider, up to 30,000 strands of hair are applied solely to Lara, with large groups of hairs controlled by master strands that dictate their movement and properties, preventing each individual hair strand from acting independently, and keeping physics calculation costs in check.