GPU Pro 5

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Hair Simulation in TressFX

Dongsoo Han

1.1 Introduction

A human has around 120,000 strands of hair, and due to its high cost of rendering

and lack of real-time simulation technique, it has been a challenge to present

human hair inside real-time video games. Therefore, many artists and game

developers have to choose alternative approaches such as simple polygons and

textures.

In this chapter, I will explain the hair simulation method in TressFX, which

has been used in the recent Tomb Raider and AMD Ruby demos. (See Figure 1.1.)

It can simulate around 19,000 strands consisting of 0.22 million vertices in less

than a millisecond in high-end GPUs. TressFX ...