Multi-Scale Appearance Modeling of Granular Materials with Continuously Varying Grain Properties
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Date
2020
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Many real-world materials such as sand, snow, salt, and rice are comprised of large collections of grains. Previously, multiscale rendering of granular materials requires precomputing light transport per grain and has difficulty in handling materials with continuously varying grain properties. Further, existing methods usually describe granular materials by explicitly storing individual grains, which becomes hugely data-intensive to describe large objects, or replicating small blocks of grains, which lacks the flexibility to describe materials with grains distributed in nonuniform manners. We introduce a new method to render granular materials with continuously varying grain optical properties efficiently. This is achieved using a novel symbolic and differentiable simulation of light transport during precomputation. Additionally, we introduce a new representation to depict large-scale granular materials with complex grain distributions. After constructing a template tile as preprocessing, we adapt it at render time to generate large quantities of grains with user-specified distributions. We demonstrate the effectiveness of our techniques using a few examples with a variety of grain properties and distributions.
Description
@inproceedings{10.2312:sr.20201134,
booktitle = {Eurographics Symposium on Rendering - DL-only Track},
editor = {Dachsbacher, Carsten and Pharr, Matt},
title = {{Multi-Scale Appearance Modeling of Granular Materials with Continuously Varying Grain Properties}},
author = {Zhang, Cheng and Zhao, Shuang},
year = {2020},
publisher = {The Eurographics Association},
ISSN = {1727-3463},
ISBN = {978-3-03868-117-5},
DOI = {10.2312/sr.20201134}
}