Hierarchical Stochastic Motion Blur Rasterization

Jacob_Munkberg
Intel Corporation

Petrik Clarberg
Intel Corporation

Jon Hasselgren
Intel Corporation

Robert Toth
Intel Corporation

Masamichi Sugihara
Intel Corporation

Tomas Akenine-Möller
Lund University/Intel Corporation

High Performance Graphics 2011

Abstract

We present a hierarchical traversal algorithm for stochastic rasterization of motion blur, which efficiently reduces the number of inside tests needed to resolve spatio-temporal visibility. Our method is based on novel tile against moving primitive tests that also provide temporal bounds for the overlap. The algorithm works entirely in homogeneous coordinates, supports MSAA, facilitates efficient hierarchical spatio-temporal occlusion culling, and handles typical game workloads with widely varying triangle sizes. Furthermore, we use high-quality sampling patterns based on digital nets, and present a novel reordering that allows efficient procedural generation with good anti-aliasing properties. Finally, we evaluate a set of hierarchical motion blur rasterization algorithms in terms of both depth buffer bandwidth, shading efficiency, and arithmetic complexity.

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