Is there some way of creating random maps?
Also, is there a way to make a river flow through the map?
Random Generated Maps?
Random maps are possible, you use an algorithm. GameDev.net should have it but it is hard to do. Using height maps, there should be a library somewhere but I don't know where. I'm planning to do random maps but with tilesets which make it much easier, as blocks of random map can be set and then randomly chosen. Using height maps, it would be possible if you did some research.
Use the water scene node to create a river.
Use the water scene node to create a river.