Wolf you old Dog. Good to hear from you. Hope all is swell.
I thought of that but what I need is the shadows from the surface dropping down onto the subjects beneath. The only way to do that is faking the caustics from the surface. A member over at Seventh Complex was kind enough to create a few simulation caustic textures for me to apply to a surface plane and shine light down through to hopefully simulate this.
I will post it if it does.
Thanks all.