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State of the Art and Future Work.

More recently, several new algorithms have been developed which
help to alleviate the restrictions of the basic radiosity solution. Ray
tracing algorithms can be modified to handle the intricacies of
accurate light transport between surfaces without explicit form factor
calculation.

'Intelligent' pre-processing of environments can subdivide the
surfaces of an environment based on the geometry of the
environment and on the probable location of light-shadow
boundaries, creating an optimal subdivision.  As noted previously, the
inherent diffuse nature of the basic radiosity algorithm has been
relaxed with the development of multiple pass algorithms which
incorporate both the diffuse and specular components of light.

Current research efforts include more accurate modeling of the
characteristics of lights and surfaces, through BRDFs (bidirectional
reflectance distribution functions), concentration on minimizing the
cost of form factor calculation, and increasing the accuracy of form
factor calculation.