At the size Slick its pretty hard to tell. Blown snow would be pure white as the background of the site page. But there is something there. My guess is its details we just cant see at the small size.
jburrage, would you mind posting 3 pics. Each a 100% size of the original but just a small section. One could be the tree bark, one a section of snow and another an area of leaves. In that way we can see what we are actually looking at and then comments being made about what should be or could be better addressed. Its kind of silly making detailed comments on something we cant see detail at all.