Shadow effects
David,
Here's a thought (from a fellow Limey<g> who's seen the drab days of merry old
England…), create a fuzzy, semi-transparent TXR texture map (possibly a
gradient fill, and use "Intensity" to create it). Place a circle or hex over
the large end of the light, a short distance from it. Texture it with the
created texture, raytrace the scene and you have an instant gel light. This
should give the effect you are seeking.
Regards,
Ian