Attached Link: This link is down at the moment

Real rendered caustics aren't possible in Poser, unfortunately. That requires photon mapping which FireFly can't do. If you're happy editing POV-Ray source files, you could use PoseRay to convert your scene, add the photon mapping statements by hand and render in POV-Ray. On the other hand, if what I just said made no sense at all, it may be best to do it some other way. ;) I do remember seeing a free caustics generator on the web somewhere, which you could use to make "fake" caustics textures - even animated ones if needed. Hopefully someone will pop into this thread who remembers where it is. - P.S. - I found the caustics generator, but the link is down. Not a good day. :(