non-shadowed volume or surface from point light source

Hi,

I have a real point light source in an assembly and would like tocapture the volume that is illuminated. There are various complexshadowed regions. If its not possible to make the lighted volumeinto a solid "part", then I may be able to make due with theilluminated surfaces.

The ultimate goal is for use in designing and positioning anoptical system where the lens always has a view of the point andother points. By capturing the volume for various points intosolids and then keeping the volume intersected by all the solids, Ican be sure that a lens in that volume can fully "see" all thepoints.

Thanks in advance.SolidworksAssemblies