Scaling your scene to at least 1000% (lights, cams, figs, props) would normally be my 1st advice. This is where RayTrace really gets choked in Poser and delivers a ton of artifacts (like with hair or, water). But, looks like you used a skin shader and that might complicate a scaleup. In P5, some (not all)root nodes did not scale and had to be manually renumbered (0.01 became 0.10),, a pita. I had an identical problem in P5 with a water prop that was a tad too lean on polys. It had a displaced surface like yours. Never resolved it. What are your water refraction settings? I'm wondering if you shouldn't use a box primitive for water. This way shadows and refraction should behave all the way down to her feet...Depends on the cam angle, of course.