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Communication Dans Un Congrès Année : 2011

Illuminating and Rendering Heterogeneous Participating Media in Real Time using Opacity Propagation

Anthony Giroud
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  • IdRef : 168083078
Venceslas Biri

Résumé

We present a new approach to illuminate and render single scattering effects in heterogeneous participating media in real time. The medium's density is modeled as a sum of radial basis functions, and is then sampled into a first volumetric grid. We then integrate the extinction function from each light source to each cell in the volume by a fast cell-to-cell propagation process on the GPU, and store the result in a second volume. We finally render both scattering medium and surfaces using a regular step ray-marching from the observer to the nearest surface. As we traverse the medium, we fetch data from both volumes and approximate a solution to the scattering equation. Our method is real-time, easy to implement and to integrate in a larger pipeline.
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Dates et versions

hal-00681747 , version 1 (22-03-2012)

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  • HAL Id : hal-00681747 , version 1

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Anthony Giroud, Venceslas Biri. Illuminating and Rendering Heterogeneous Participating Media in Real Time using Opacity Propagation. International Conference on Computer Graphics Theory and Applications GRAPP'11, Jun 2011, Portugal. pp.113-118. ⟨hal-00681747⟩
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