Voxel-based global illumination

  • Authors:
  • Sinje Thiedemann;Niklas Henrich;Thorsten Grosch;Stefan Müller

  • Affiliations:
  • University of Koblenz-Landau, Germany;University of Koblenz-Landau, Germany;University of Magdeburg, Germany;University of Koblenz-Landau, Germany

  • Venue:
  • I3D '11 Symposium on Interactive 3D Graphics and Games
  • Year:
  • 2011

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Abstract

Computing a global illumination solution in real-time is still an open problem. We introduce Voxel-based Global Illumination (VGI), a scalable technique that ranges from real-time near-field illumination to interactive global illumination solutions. To obtain a voxelized scene representation, we introduce a new atlas-based boundary voxelization algorithm and an extension to a fast ray-voxel intersection test. Similar to screen-space illumination methods, VGI is independent of the scene complexity. Using voxels for indirect visibility enables real-time near-field illumination without the screen-space artifacts of alternative methods. Furthermore, VGI can be extended to interactive, multi-bounce global illumination solutions like path tracing and instant radiosity.