Radiosity method has been extended to take into account not only spectral distribution of light sources but also their emission geometry. Form factor computation has been solved adopting three main methods: Malley, Hemicube and Stokes. To improve approximation for high luminance gradients an adaptive subdivision method has also been implemented. All methods have been extended to progressive refinement in order to increase final image quality. A comparison between different methods has been done and results are available:
These two pictures show the computed illuminance on the table's surface in a room modelled from a real case.
Simulation of a cylindrical light source (neon tube): top three pictures show the effect on the ceiling, three bottom pictures show the effect on the floor (200k).
Simulation of a spherical light source: top three pictures show the effect on the ceiling, three bottom pictures show the effect on the floor (200k).
