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18. Pre-Computed Radiance Transfer: Theory and Practice

Half-Day, Monday, 1 August, 8:30 am - 12:15 pm
Petree Hall C
Level: Intermediate

Realistic shading and how it can be achieved using precomputed radiance transfer. The course covers: the theory underlying a general model of shading and shadowing for real-time rendering, basic radiance transfer techniques, more advanced techniques that incorporate higher-frequency lighting and arbitrary BRDFs, the differences among these algorithms, and insights the presenters have gained working in this area. And it includes implementation details and a complete theoretical derivation.


Some knowledge of a low-level graphics API such as DirectX or OpenGL. Knowledge of shading algorithms, linear algebra, and basic global illumination is useful.

Intended Audience

Everybody who is interested in realistic real-time shading. The course is designed for people who already have some knowledge of real-time rendering and want to learn a more sophisticated shading technique.


Jan Kautz
Massachusetts Institute of Technology

Jaakko Lehtinen
Helsinki University of Technology and Remedy Entertainment Ltd.

Peter-Pike Sloan
Microsoft Corporation


8:30 Introduction
- Problem Statement
- Definitions


9 Diffuse Precomputed Radiance Transfer


9:15 General Precomputed Radiance Transfer

Jaakko and Lehtinen

10:15 Break
10:30 SH Light Representations


11:00 Practical PRT I


11:30 Practical PRT II


Noon Conclusions/Summary