Sub-triangle opacity masks for faster ray tracing of transparent objects

Sub-triangle opacity masks for faster ray tracing of transparent objects

We propose an easy and simple-to-integrate approach to accelerate ray tracing of alpha-tested transparent geometry with a focus on Microsoft® DirectX® or Vulkan® ray tracing extensions. Pre-computed bit masks are used to quickly determine fully transparent and fully opaque regions of triangles there...

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Veröffentlicht in:Proceedings of the ACM on computer graphics and interactive techniques 2020-08, Vol.3 (2), p.1-12, Article 18
Hauptverfasser: Gruen, Holger, Benthin, Carsten, Woop, Sven
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Computer graphics
Computing methodologies
Ray tracing
Rendering
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container_title Proceedings of the ACM on computer graphics and interactive techniques
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creator Gruen, Holger
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Woop, Sven
description We propose an easy and simple-to-integrate approach to accelerate ray tracing of alpha-tested transparent geometry with a focus on Microsoft® DirectX® or Vulkan® ray tracing extensions. Pre-computed bit masks are used to quickly determine fully transparent and fully opaque regions of triangles thereby skipping the more expensive alpha-test operation. These bit masks allow us to skip up to 86% of all transparency tests, yielding up to 40% speed up in a proof-of-concept DirectX® software only implementation.
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subjects Computer graphics
Computing methodologies
Ray tracing
Rendering
title Sub-triangle opacity masks for faster ray tracing of transparent objects
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