1.6. Eye-View Pixel Anti-Aliasing for Irregular Shadow Mapping by Adam Lake

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Chapter 1.6. Eye-View Pixel Anti-Aliasing for Irregular Shadow Mapping

Nico Galoppo, Intel Advanced Visual Computing (AVC)

The irregular shadows algorithm (also known as Irregular Z-Buffer shadows) combines the image quality and sampling characteristics of ray-traced shadows with the performance advantages of depth buffer–based hardware pipelines [Johnson04]. Irregular shadows are free from aliasing from the perspective of the light source because the occlusion of each eye-view sample is evaluated at sub-pixel precision in the light view. However, irregular shadow mapping suffers from pixel aliasing in the final shadowed image due to the fact that shadow edges and high-frequency shadows are not correctly captured by the resolution ...

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