GPU Pro 6

5

III

Real-Time Global Illumination

Using Slices

Hugh Malan

5.1 Introduction

In this chapter, we’ll present a method for implementing real-time single-bounce

global illumination.

In recent years, several practical real-time global illumination techniques have

been demonstrated. These have all been voxel-based scene databases.

The common theme of all these approaches is to initialize the data structure

using the lit scene geometry. Then, a propagation or blurring step is applied, and

after that the structure is ready for irradiance or reflection queries.

The Light Propagation Volumes (LPV) method [Kaplanyan and Dachs

-bacher 10] uses a voxel array, where