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Efficient tracing of single and incoherent rays is still a challenge in computer graphics. Coherent packet tracing has reached real-time performance, but ray packets bring about restrictions for the architecture of the renderer and their suitability for diverging secondary ray bundles is uncertain. The algorithm presented in this paper avoids these problems by not using ray packets at all. Instead,...
Despite their algorithmic elegance and robustness, bounding volume hierarchies (BVHs) have not reached the performance of kd- trees for ray tracing. BVHs do not adapt well to scenes containing large triangles with overlapping bounding boxes. A node cannot be smaller than the bounding box of the primitives it contains. Consequently, the leafs and internal nodes will overlap substantially. This slows...
High quality ray tracing requires pixel sampling and filtering for antialiasing, as well as illumination sampling for complex lighting effects. Both problems are well understood and sophisticated sampling techniques are available for each of them. However, it turns out that weighted pixel sampling spoils the benefits of clever illumination sampling, even with the best filter functions. We propose...
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