This paper proposes a new form factor algorithm for radiosity
solutions.  The new algorithm substantially reduces aliasing problems
inherent in the {\em hemicube method} without giving up several of the
advantages of the hemicube. The algorithm has its basis in the
technique of area anti-aliasing in image rendering.  Our method
preprocesses 
the input surfaces, and there is also an  extra computational cost
involved in scan conversion of patches as well as occlusion testing;
however, this expense is less than the extra cost associated with an
increase in hemicube resolution to improve image quality. Further, the
method can be embedded in several existing  radiosity algorithms such as
adaptive subdivision and progressive refinement radiosity. Finally, the
extended area anti-aliasing can also be used in applications other
than radiosity (such as image rendering of complex scenes on a raster
display device).

Joint work with Chetan Rai and M.S. Phani.