Z-Thickness Blending: Effective Fragment Merging for Multi-Fragment Rendering
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Date
2021
Authors
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Journal ISSN
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Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
An effective fragment merging technique is presented in this study that addresses multi-fragment problems, including fragment overflow and z-fighting, and provides visual effects that are beneficial for various screen-space rendering algorithms. The proposed method merges locally adjacent fragments along the viewing direction to resolve the aforementioned problems based on cost-effective multi-layer representation and coplanar blending. We introduce a z-thickness model based on the radiosity spreading from the viewing z-direction. Moreover, we present the fragment-merging schemes and rules for determining the visibility of the merged fragments based on the proposed z-thickness model. The proposed method is targeted at multi-fragment rendering that handles individual fragments (e.g., k-buffer) instead of representing the fragments as an approximated transmittance function. In addition, our method provides a smooth visibility transition across overlapping fragments, resulting in visual advantages in various visualization applications. In this paper, we demonstrate the advantages of the proposed method through several screen-space rendering applications.
Description
@article{10.1111:cgf.14409,
journal = {Computer Graphics Forum},
title = {{Z-Thickness Blending: Effective Fragment Merging for Multi-Fragment Rendering}},
author = {Kim, Dongjoon and Kye, Heewon},
year = {2021},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.14409}
}