There are wave settings for the waves that are used in the ps 2.0 water shader. The wave parameters do not affect the 1.0 water movement. The water shader uses the wave parameters to sample the water bumpmap and combine it in different ways to get the final movement effect. It averages the first two waves and adds the third at 1/3 the strength of the first two. The purpose of the third wave is to break up repetitive patterns that the first two can form. It is best, therefore, to use a larger texture scale for the third wave. The parameters for the waves are: