Hi Karl. The snow effect is excellent. The tree is perfect. The texture is perfect and the transparency of the snow, letting whats underneath show through is perfect .... but that where the problem lays.
Theres nothing underneath to show through. For a muddy area it would be great, but it makes the tree look really out of place, as theres no other vegetation. Not even stones or previous signs of life.
Sorry for being nit-picky, but the snow effect is really well done, it seems unjust to not use it to its full advantage.
How did you make the snow?