GPU Pro 4

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Practical Planar Reflections Using

Cubemaps and Image Proxies

S´ebastien Lagarde and Antoine Zanuttini

1.1 Introduction

Rendering scenes with glossy and specular reflections has always been a challenge

in the field of real-time rendering. Due to their importance in assessing image

quality, many techniques have been developed to simulate reflections. These

techniques can be classified in four categories:

1. Real-time techniques, such as dynamic environment mapping, with all kinds

of parameterization: cubemaps, 2D mirror planes, dual paraboloid. Dy-

namic reflections of this type are accurate but costly because they require

resending the whole scene to the ...