No matter how great a video game heroine's hair looks, or how many individual furs are articulated on an anthropomorphic Pixar character, we can still instantly tell that computer-generated graphics are just that -- generated by a computer. Aside from human eyes and mouths, one of the biggest enemies of the Uncanny Valley is computer-generated water. With PhysX's position based fluids, though, CG water flows the best we've ever seen.