Cloud Mountain Retreat

[Kadri]

Bob this looks good!
Not sure  if you would like to do this,but you could bring the size of the plants to half or so and could maintain the big scale of the rock behind the Cabin in this way.
The Cabin would look bigger in this approach too of course.

[Dune]

Strange that you need a reflectivity of 15... you might only need a reflective shader (RT reflections, reflectivity of just 1, index of 1.5 something) for this distant shot (no need for transparency), and keep the default attached with a grayish color? You could try that.

[j meyer]

It might have to do with the decay value in the water shader,just a guess.