Sony Pictures Imageworks Arnold

Kulla, Christopher; Conty, Alejandro; Stein, Clifford; Gritz, Larry

doi:10.1145/3180495

Cited by 29 publications

(21 citation statements)

References 40 publications

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“…Our approach provides high-performance rendering with low memory overhead for up to billions of primitives. Furthermore, our method is general enough to embed into any ray tracing framework, such as Nvidia Optix [PBD*10], or production film renderers such as Cycles [Fou] and Arnold [KCSG18].…”

Section: Discussionmentioning

confidence: 99%

Ray Tracing Generalized Tube Primitives: Method and Applications

Han

Wald

Usher

et al. 2019

Computer Graphics Forum

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We present a general high-performance technique for ray tracing generalized tube primitives. Our technique efficiently supports tube primitives with fixed and varying radii, general acyclic graph structures with bifurcations, and correct transparency with interior surface removal. Such tube primitives are widely used in scientific visualization to represent diffusion tensor imaging tractographies, neuron morphologies, and scalar or vector fields of 3D flow. We implement our approach within the OSPRay ray tracing framework, and evaluate it on a range of interactive visualization use cases of fixed- and varying-radius streamlines, pathlines, complex neuron morphologies, and brain tractographies. Our proposed approach provides interactive, high-quality rendering, with low memory overhead.

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Section: Discussionmentioning

confidence: 99%

Ray Tracing Generalized Tube Primitives: Method and Applications

Han

Wald

Usher

et al. 2019

Computer Graphics Forum

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“…They report that both techniques perform competently, with scrambled LD sequences performing the best. In contrast, Kulla et al [KCSG18] report that ART [ANHD17] gives favorable results for the Arnold rendering framework.…”

Section: Error Analysis For Common Sampling Techniquesmentioning

confidence: 99%

Analysis of Sample Correlations for Monte Carlo Rendering

Singh

Öztireli

Ahmed

et al. 2019

Computer Graphics Forum

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Modern physically based rendering techniques critically depend on approximating integrals of high dimensional functions representing radiant light energy. Monte Carlo based integrators are the choice for complex scenes and effects. These integrators work by sampling the integrand at sample point locations. The distribution of these sample points determines convergence rates and noise in the final renderings. The characteristics of such distributions can be uniquely represented in terms of correlations of sampling point locations. Hence, it is essential to study these correlations to understand and adapt sample distributions for low error in integral approximation. In this work, we aim at providing a comprehensive and accessible overview of the techniques developed over the last decades to analyze such correlations, relate them to error in integrators, and understand when and how to use existing sampling algorithms for effective rendering workflows.

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“…A numerically more robust variant for small spheres has been provided by Hearn and Baker [3], used for example by Sony Pictures Imageworks [4]. The idea is to rewrite b 2 − 4ac, where we use the convenient notation that .…”

Section: Floating-point Precision Considerationsmentioning

confidence: 99%

Precision Improvements for Ray/Sphere Intersection

2019

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The traditional quadratic formula is often presented as the way to compute the intersection of a ray with a sphere. While mathematically correct, this factorization can be numerically unstable when using floating-point arithmetic. We give two little-known reformulations and show how each can improve precision. 7.1 BASIC RAY/SPHERE INTERSECTION One of the simplest objects to ray trace is the sphere-no wonder that many early ray traced images featured spheres. See Figure 7-1.

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Sony Pictures Imageworks Arnold

Cited by 29 publications

References 40 publications

Ray Tracing Generalized Tube Primitives: Method and Applications

Ray Tracing Generalized Tube Primitives: Method and Applications

Analysis of Sample Correlations for Monte Carlo Rendering

Precision Improvements for Ray/Sphere Intersection

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