Notice the realistic, reflective water with wave emitters and a particle system at the base of the waterfall combined with the high detail trees in the background. The system behind the sequel to No One Lives Forever, Jupiter features an enriched polygrid that supports dynamic lighting as well as Fresnel reflections. It also supports non-square areas--empowering the creation of more realistic-looking bodies of water. The water system also features wave emitters, cubic environment mapping and a variety of effect triggers

Update: for those confused about if this is a tech demo or actual No One Lives Forever 2 stuff, here's a note from LithTech "This AVI was taken from the actual Japan level of the sequel to No One Lives Forever. While LithTech is releasing it to showcase the water effects system of Jupiter, it is actual footage taken from within the game".