Level-of-Detail for Production-Scale Path Tracing

Prus M, Eisenacher C, Stamminger M (2015)

Publication Type: Conference contribution, Original article

Publication year: 2015

Publisher: Eurographics Association

Edited Volumes: VMV 2015 - Vision, Modeling and Visualization

Pages Range: 73-78

Conference Proceedings Title: Vision, Modeling & Visualization

Event location: Aachen

ISBN: 9783905674958

DOI: 10.2312/vmv.20151260


Path-traced global illumination (GI) becomes increasingly important in movie production. With offscreen elements
considerably contributing to the path traced image, geometric complexity increases drastically, requiring
geometric instancing or a variety of manually created and baked LOD. To reduce artists’ work load and bridge
the gap between mesh-based LOD (Mip-maps) and voxel-based LOD (brickmaps), we propose to use an SVO
with averaged BRDF parameters, e.g. for the Disney-BRDF, and a normal distribution per voxel. During shading
we construct a BRDF from the averaged BRDF parameters and evaluate it with a random normal sampled from
the distribution. This is simple, memory-efficient, and handles a wide variety of geometry scales and materials
seamlessly, with proper filtering. Further it is efficient to construct, which allows quick artist iterations as well as
automatic and lazy generation on scene loading.

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Prus, M., Eisenacher, C., & Stamminger, M. (2015). Level-of-Detail for Production-Scale Path Tracing. In Vision, Modeling & Visualization (pp. 73-78). Aachen: Eurographics Association.


Prus, Magdalena, Christian Eisenacher, and Marc Stamminger. "Level-of-Detail for Production-Scale Path Tracing." Proceedings of the Vision, Modeling & Visualization, Aachen Eurographics Association, 2015. 73-78.

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