I don't mean how to write one but rather what approach to use and what to consider when setting one up for use. I see the options but a) I don't know what they do and b) don't know what other settings might affect them. So say I have an area around a marina (some land you walk on, some sand you can walk on and a ship sitting in water which extends to the horizon). How do I approach getting a "nice" water effect? And would those settings change if I applied it to say a small pool on the land? On my small test plane I see very tiny swirls but have no idea how to make them larger or to change the overall effect.