river spline mesh

I did not just convince the river material, in the spline mesh, some help so that it does not reflect as much, and it adapts to the fog like the rest of objects?

ok, i created other material, more good, but other error… create spline mesh, is perfect but… add spline mesh, and the “screen in angle” is distorsion texture - no tileable…" help???

screen : scale 2.0 add spline point

screen : scale 1.0 add spline point see perfect tileable

I have speedtree and the trees max 3 lod. I need to add 1 lod more and know how to put in lod 4 a “flat” 2D or make it disappear. As I do.