A Multidirectional Occlusion Shading Model for Direct Volume Rendering

Veronika Solteszova*, Daniel Patel, Stefan Bruckner, Ivan Viola

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


In this paper, we present a novel technique which simulates directional light scattering for more realistic interactive visualization of volume data. Our method extends the recent directional occlusion shading model by enabling light source positioning with practically no performance penalty. Light transport is approximated using a tilted cone-shaped function which leaves elliptic footprints in the opacity buffer during slice-based volume rendering. We perform an incremental blurring operation on the opacity buffer for each slice in front-to-back order. This buffer is then used to define the degree of occlusion for the subsequent slice. Our method is capable of generating high-quality soft shadowing effects, allows interactive modification of all illumination and rendering parameters, and requires no pre-computation.

Original languageEnglish
Pages (from-to)883-891
Number of pages9
JournalComputer Graphics Forum
Issue number3
StatePublished - 2010
Externally publishedYes




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