[lowfighter]

Just experimented a bit with fabianfred's river plates, mainly changed the specualr and specular power in the matfile. So the result is pretty nice as now the river "shines" when player have the right angle of view. I used
Ambient 1.0
Diffuse 1.0
Specular 0.3
SpecularPow 10
Shine 0.0

Here is a screenshot, the shine is not so obvious, much better seen in motion but anyway: