GPU Pro 4

6

II

Progressive Screen-Space

Multichannel Surface Voxelization

Athanasios Gaitatzes and Georgios Papaioannou

6.1 Introduction

An increasing number of techniques for real-time global illumination effects rely

on volume data. Such representations allow the fast, out-of-order access to spa-

tial data from any deferred shading graphics pipeline stage as in [Thiedemann et

al. 11, Mavridis and Papaioannou 11, Kaplanyan and Dachsbacher 10]. For dy-

namic environments where both the geometry of the scene and the illumination

can arbitrarily change between frames, these calculations must be performed in

real time. However, when the per frame time budget is limited ...