Particularity of algorithms and data representation in Lumicept lighting simulation system in scope of verification against CIE 171:2006 test cases

Particularity of algorithms and data representation in Lumicept lighting simulation system in scope of verification against CIE 171:2006 test cases

Kopylov M.S. (KIAM RAS, Moscow, Russia)
Birukov E.D. (KIAM RAS, Moscow, Russia)
Potemin I.S. (ITMO, St. Petersburg, Russia)
Voloboy A.G. (KIAM RAS, Moscow, Russia)

Abstract

The paper describes functional particularity of the Lumicept lighting simulation system analyzed in the scope of verification against CIE 171:2006 test cases developed by International commission on Illumination (CIE). Methods used in Lumicept and other lighting simulation software are shortly described, in particular, a finite element method and a backward raytracing method. The Lumicept system particularity influenced testing procedure includes particular lighting simulation algorithms used in test cases, as well as scene data representation specifics. The simulation algorithms used are direct Monte Carlo ray tracing, including path tracing methods (Path Tracing), and specialized methods, such as the method for Daylight Autonomy calculation. Scene representation particularity includes setting the optical parameters of the surfaces and modeling of point and area light sources. Various random number generators used in stochastic ray tracing are also discussed. The results of testing the Lumicept system demonstrated that the system correctly simulates light propagation, and the accuracy of the results is comparable to the accuracy of results from other popular systems.

Keywords

optical modeling; lighting simulation; physically based rendering; ray tracing; software validation; lighting simulation test cases; International commission on Illumination; CIE 171:2006.

Edition

Proceedings of the Institute for System Programming, vol. 38, issue 3, part 3, 2026, pp. 49-64

ISSN 2220-6426 (Online), ISSN 2079-8156 (Print).

DOI: 10.15514/ISPRAS-2026-38(3)-35

For citation

Kopylov M.S., Birukov E.D. Potemin I.S., Voloboy A.G. Particularity of algorithms and data representation in Lumicept lighting simulation system in scope of verification against CIE 171:2006 test cases. Proceedings of the Institute for System Programming, vol. 38, issue 3, part 3, 2026, pp. 49-64 DOI: 10.15514/ISPRAS-2026-38(3)-35.

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