Combined volume and surface rendering with global illumination caching

Uroš Šmajdek, Žiga Lesar, Matija Marolt, Ciril Bohak

Research output: Contribution to journalArticlepeer-review


We present a combined volume and surface rendering technique with global illumination caching. Our approach uses volumetric path tracing to compute the global illumination volume and local shading models for rendering the isosurface. By joining both visualization approaches, we have enhanced the display and illumination of the surfaces while preserving physically realistic illumination of the participating media. To achieve real-time performance and avoid recomputing the image when the camera view changes, we compute the global illumination volume incrementally and defer the projection to a later step. We evaluated our technique by comparing different local shading models for isosurface rendering with the result of full volumetric path tracing and with the non-caching variant of our technique. Results show that the caching and non-caching variants perform comparably well, while the caching variant has the added benefit of being camera-view-independent. Additionally, we show that our approach emphasizes the surfaces within volumes better than volumetric path tracing.
Original languageEnglish (US)
JournalVisual Computer
StatePublished - Jun 26 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-07-07
Acknowledgements: The authors did not receive any financial support for the submitted work.

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Software
  • Computer Vision and Pattern Recognition


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