The documentation
River Water Bodies act as connections between other water bodies. At the points where lakes and oceans intersect a river, you can use a transitional material to automatically blend them together seamlessly. Water Body Actors in Unreal Engine | Unreal Engine 5.5 Documentation | Epic Developer Community
I have setup a river and ocean in 5.5 and it is not seamlessly blended
The river materials …
When zooming closer the transition looks better
Mine isn’t either. I’ve been sitting here for three hours trying to figure out how to do it.
My custom system does it via a blend of distance to nearest, stencil, and render targets.
The challenge is that the river water has to displace the larger body of water and “mix in" so to speak - also generating waves rather than receiving gerstner and other waves.
If you only have one river to deal with, this is trivial; make a material with a texture that represents the river rather than a general water material.
If you have more entry points, then you need a custom system/material like I need to create (granted I went and did this before epic even came out with their trash solution to water).
