Real-Time Ray-Traced Soft Shadows of Environmental Lighting by Conical Ray Culling

IF 2.3 Q3 COMPUTER SCIENCE, SOFTWARE ENGINEERING
Yang Xu, Yu Jiang, Junbo Zhang, Kang Li, Guohua Geng
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引用次数: 1

Abstract

Soft shadows of environmental lighting provide important visual cues in realistic rendering. However, rendering of soft shadows of environmental lighting in real-time is difficult because evaluating the visibility function is challenging. In this work, we present a method to render soft shadows of environmental lighting at real-time frame rates based on hardware-accelerated ray tracing. We assume that the scene contains both static and dynamic objects. To composite the soft shadows cast by dynamic objects with the precomputed lighting of static objects, the incident irradiance occluded by dynamic objects, which is obtained by accumulating the occluded incident radiances over the hemisphere using ray tracing, is subtracted from the precomputed incident irradiance. Conical ray culling is proposed to exclude the rays that cannot intersect dynamic objects, which significantly improves rendering efficiency. Rendering results demonstrate that our proposed method can achieve real-time rendering of soft shadows of environmental lighting cast by dynamic objects.
锥形消隐法实时跟踪环境光的软阴影
环境照明的柔和阴影在现实渲染中提供了重要的视觉线索。然而,环境照明的软阴影的实时渲染是困难的,因为评估能见度函数是具有挑战性的。在这项工作中,我们提出了一种基于硬件加速光线追踪的实时帧率渲染环境照明软阴影的方法。我们假设场景包含静态和动态对象。为了合成动态物体投射的软阴影与预先计算的静态物体的光照,在预先计算的入射辐照度中减去动态物体遮挡的入射辐照度,该入射辐照度是通过光线追踪在半球上累积遮挡的入射辐照度而得到的。提出了锥形射线剔除方法,排除了不能与动态物体相交的射线,显著提高了绘制效率。渲染结果表明,该方法可以实现动态物体投射的环境照明柔和阴影的实时渲染。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.90
自引率
0.00%
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