I am trying to follow this tutorial: https://cgcookie.com/lesson/snow/ to create a snow material. Here is an image from the tutorial of the intended effect:
However, I am running into a problem creating displacement via the material. My .blend is here:
I am using noise textures to produce the fine-grained displacement characteristic of fluffy snow. The texture itself looks fine:
but when I come to render, the displacement is mysteriously much larger scale (coarser) than expected. Here is an example render:
The underlying subsurf is much finer than the structure shown in the render. Does anyone have an idea what the problem is here?