Hi @SDVenom VEA GAMES
First of all I would like to thank for the excellent work. LAM really is a very beautiful work. See it as a positive feedback.
About [MENTION=24522]John Alcatraz[/MENTION] post below:
There is a river tool included in LAN?
Where? OK! Does not have a river tool! No problem 
It can be found in Procedural Nature Pack 1 and the Kit Demo, but you only wants the a river creation tool using splines, the Kit Demo is only 30GB of wonderful content offered by Epic.
But the biggest problem is not lack of river authoring tool in LAM. The problem is, when I excavate the landscape with a lot of grass using displacement tool, a lot of grass remains under the ground, where should be the bottom of the river, and it is very difficult to erase when the terrain under the river is quite irregular. Some foliage can not be erased and remains consuming a lot of performance as phantom grass and flowers (non aquatic vegetation) scattered under the rivers.
THE QUESTION:
There is a way to automatically delete foliage that reach to a certain depth or height (setting a foliage occlusion/erasing value, as Z depth/height)?
About new Features mentioned in the post below posted in 09-22-2016
Any NEWS??? PLEEEEASE!!!