New landform - something looks like rivers. I call them pseudo rivers. Of course this is not real rivers, ie they not flow from highland to the sea, they have no inflows, etc. River nets sometimes look strange - like blood vessels, and even can make circular bayous. To have 3D water, their surface must be on a sea level, so they really look good only near shores. So I simply limit their generation on highland. However they sometimes create nice looking valleys in mountain rages.