Unreal Tournament like watereffect

How works these beautifull water surface in Unreal? Are there palette effects? Is there a way to modify a texture without reloading?

Looks like there is a way to do these effect without extensions and with low memory-usage!

they’re just procedural effects have a look here. note in UT they’re not realtime generated. step into the water and see the effect your body makes to the surface. sort of shatters the whole effect http://members.nbci.com/myBollux