“Unbiased Emission and Scattering Importance Sampling For Heterogeneous Volumes” by Huang, Kutz, Li and Chiang
Conference:
Type(s):
Entry Number: 18
Title:
- Unbiased Emission and Scattering Importance Sampling For Heterogeneous Volumes
Presenter(s)/Author(s):
Abstract:
We present two new distance-sampling methods for production volume path tracing. We extend the null-collision integral formulation to efficiently gather heterogeneous volumetric emission, achieving higher-quality results. Additionally, we propose a tabulation-based approach to importance sample volumetric in-scattering through a spatial guiding data structure. Our methods improve the sampling efficiency for scenarios where low-order heterogeneous scattering dominates, which tends to cause high variance renderings with existing null-collision methods.
References:
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