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:

  • See: Canesi A., Marini D., Perricone G. "Videorealism methods for interior light design", in: M.R. Beheshti, K. Zreik Ed.'s, Advanced technologies: architecture, planning, civil engineering, Elsevier, Amsterdam (1993)

These two pictures show the computed illuminance on the table's surface in a room modelled from a real case.

Left: the computed illuminance (170k); right: another view of the same room (220k)

Examples of photometric solid simulation

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).


Other examples

A room with a candle on the table. (left 40k right 20k)

Three views of an interior (left 160k, centre 250k, right 180k)

An interior with a billiard and a fireplace (160k).

To see an equalised version click here