Although this is not specific to RTMM it adds a great deal to the water in FSX and enhances the experience. It is a utility named FSX Water Configurator. Freeware and professional looking. It provides pre-defined setup and free style (roll you own) configurations for the water in the sim.
Below are a couple of screen shot I did today to show comparisons.
(Click to enlarge)
First shot below is the FSX
Default water to the north of Ketchikan
Second shot is from a 'favorite within FSX Water Confiurator. (has 36 presets available plus create your own)
The link for the software is:
http://www.strikingsoftware.com/downloads.shtmlEnjoy.