Implementing Virtual Ray Lights for Rendering Scenes with Participating Media

Information

• Publication Type: Bachelor Thesis
• Workgroup(s)/Project(s):
  • Rendering and Modeling
• Date: August 2018
• Date (Start): 1. January 2018
• Date (End): 7. August 2018
• Matrikelnummer: 01227129
• First Supervisor:
  • Karoly Zsolnai-Fehér
  • Michael Wimmer
• Keywords: global illumination, virtual point lights

Abstract

This thesis documents the full implementation of the method Virtual Ray Lights for Rendering Scenes with Participating Media. As a basic understanding of the foundations of rendering and related approaches is necessary to understand this complex method, these foundations are discussed first. There, the rendering equation and the physical behaviour of light is described. Additionally, rendering approaches like Recursive Ray Tracing and Photon Mapping that do not consider participating media, as well as methods like Volumetric Photon Mapping, Virtual Point Lights and Photon Beams, which are able to render participating media, are evaluated. For the discussion on Virtual Ray Lights, the evaluation takes place in three parts. First, the method is discussed in general with a mathematical analysis. Afterwards, implementation details are evaluated where pseudocode examples are provided. Lastly, the rendered results of the implementation are evaluated thoroughly. These results are also compared to provided images from various research papers. The goal of this thesis is to provide an implementation of Virtual Ray Lights, as well as providing the tools to implement this method in other projects. We provide the well-documented source code for this project, with the scene settings to recreate the examples.

Additional Files and Images

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BibTeX

@bachelorsthesis{OPPTIZ-2018-IVRL,
  title =      "Implementing Virtual Ray Lights for Rendering Scenes with
               Participating Media",
  author =     "Michael Oppitz",
  year =       "2018",
  abstract =   "This thesis documents the full implementation of the method
               Virtual Ray Lights for Rendering Scenes with Participating
               Media. As a basic understanding of the foundations of
               rendering and related approaches is necessary to understand
               this complex method, these foundations are discussed first.
               There, the rendering equation and the physical behaviour of
               light is described. Additionally, rendering approaches like
               Recursive Ray Tracing and Photon Mapping that do not
               consider participating media, as well as methods like
               Volumetric Photon Mapping, Virtual Point Lights and Photon
               Beams, which are able to render participating media, are
               evaluated. For the discussion on Virtual Ray Lights, the
               evaluation takes place in three parts. First, the method is
               discussed in general with a mathematical analysis.
               Afterwards, implementation details are evaluated where
               pseudocode examples are provided. Lastly, the rendered
               results of the implementation are evaluated thoroughly.
               These results are also compared to provided images from
               various research papers. The goal of this thesis is to
               provide an implementation of Virtual Ray Lights, as well as
               providing the tools to implement this method in other
               projects. We provide the well-documented source code for
               this project, with the scene settings to recreate the
               examples.",
  month =      aug,
  address =    "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
  school =     "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology ",
  keywords =   "global illumination, virtual point lights",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/2018/OPPTIZ-2018-IVRL/",
}