There is a good product called Sea Vue which is avalible at 3d commune in n thier store, there are a bunch of textures, objects, terrainemats and and stuff  there is also a good tutorial for this kits use  whic ightn gove you someideas, they are by chipp walters here is the link:
http://www.altuit.com/webs/altuit2/VueTraining/Vodcasts.htm
hope this helps