NDLI: Automatic bounding of programmable shaders for efficient global illumination

Content Provider	ACM Digital Library
Author	Zhao, Shuang Bala, Kavita Velázquez-Armendáriz, Edgar Hašan, Miloš Walter, Bruce
Abstract	This paper describes a technique to automatically adapt programmable shaders for use in physically-based rendering algorithms. Programmable shading provides great flexibility and power for creating rich local material detail, but only allows the material to be queried in one limited way: point sampling. Physically-based rendering algorithms simulate the complex global flow of light through an environment but rely on higher level information about the material properties, such as importance sampling and bounding, to intelligently solve high dimensional rendering integrals. We propose using a compiler to automatically generate interval versions of programmable shaders that can be used to provide the higher level query functions needed by physically-based rendering without the need for user intervention or expertise. We demonstrate the use of programmable shaders in two such algorithms, multidimensional lightcuts and photon mapping, for a wide range of scenes including complex geometry, materials and lighting.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISBN	9781605588582
DOI	10.1145/1661412.1618488
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2009-12-17
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Many-lights Global illumination Interval arithmetic
Content Type	Text
Resource Type	Article

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Automatic bounding of programmable shaders for efficient global illumination