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Symmetry 2018, 10(4), 125; https://doi.org/10.3390/sym10040125

Efficient Algorithms for Real-Time GPU Volumetric Cloud Rendering with Enhanced Geometry

Software Engineering and Computer Systems Department, National Distance Education University (UNED), 28040 Madrid, Spain
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Received: 6 March 2018 / Revised: 13 April 2018 / Accepted: 18 April 2018 / Published: 20 April 2018
(This article belongs to the Special Issue Information Technology and Its Applications 2018)

Abstract

This paper presents several new techniques for volumetric cloud rendering using efficient algorithms and data structures based on ray-tracing methods for cumulus generation, achieving an optimum balance between realism and performance. These techniques target applications such as flight simulations, computer games, and educational software, even with conventional graphics hardware. The contours of clouds are defined by implicit mathematical expressions or triangulated structures inside which volumetric rendering is performed. Novel techniques are used to reproduce the asymmetrical nature of clouds and the effects of light-scattering, with low computing costs. The work includes a new method to create randomized fractal clouds using a recursive grammar. The graphical results are comparable to those produced by state-of-the-art, hyper-realistic algorithms. These methods provide real-time performance, and are superior to particle-based systems. These outcomes suggest that our methods offer a good balance between realism and performance, and are suitable for use in the standard graphics industry. View Full-Text
Keywords: ray-tracing; algorithms; fractals; volumetric rendering; radiometry; computational geometry ray-tracing; algorithms; fractals; volumetric rendering; radiometry; computational geometry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jiménez de Parga, C.; Gómez Palomo, S.R. Efficient Algorithms for Real-Time GPU Volumetric Cloud Rendering with Enhanced Geometry. Symmetry 2018, 10, 125.

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