Inverse lighting design for interior buildings integrating natural and artificial sources

Inverse opening design with anisotropic lighting incidence

“…In this approach the designer is free to define LIs as any set of goals and constraints, linear or nonlinear, related to the emitter or to the global illumination on any surface of the scene [5,11].…”

“…The method exploits the coherence of architectural models for building a compact representation for radiosity, enabling many different solutions to be explored efficiently, as in [5]. The work mentioned is confined to only dealing with diffuse skylight shape optimizations, which can be considered as Lambertian emitters.…”

“…This outcome allows full global radiosity, an important cue to be determined in daylight analysis [1]. Furthermore, it allows the radiosity calculation to be carried out in any individual patch without requiring the previous calculation of it in the whole scene [5]. These results are suitable for optimization purposes because, for different opening configurations, they simplify (at a high per second rate) the calculation of the lighting for any surface.…”

“…Global illumination coherence in architectural models is exploited in [5] using a low-rank radiosity (LRR) approach in combination with a metaheuristic method for optimization. In this case, optimal shapes of diffuse skylights can be obtained in mere minutes.…”

“…The main drawback of such a design strategy is that it is not suitable for optimization problems where, in order to find the solution that maximizes the goal, there are thousands of possible configurations to be tested. An alternative procedure is to use an inverse problem approach [3][4][5].…”