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Layered Weighted Blended Order-Independent Transparency

Fabian Friederichs (TH Köln, Germany), Martin Eisemann (TU Braunschweig, Germany), Elmar Eisemann (Delft University of Technology, Netherlands)


Proceedings of Graphics Interface 2021:
Virtual Event,
28 – 29 May 2021, pp. 196 – 202

Abstract

Our approach improves the accuracy of weighted blended orderindependent transparency, while remaining efficient and easy to implement. We extend the original algorithm to a layer-based approach, where the content of each layer is blended independently before compositing them globally. Hereby, we achieve a partial ordering but avoid explicit sorting of all elements. To ensure smooth transitions across layers, we introduce a new weighting function. Additionally, we propose several optimizations and demonstrate the method's effectiveness on various challenging scenes in terms of geometricand depth complexity. We achieve an error reduction more than an order of magnitude on average compared to weighted blended order-independent transparency for our test scenes.

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