I would not have had the patience to do it all by brushing LOL! I did a selection by color range and then applied that selection to a color balance layer. I was then able to adjust the color on that layer and those adjustments only affected the selected areas. By doing that I was able to add more yellow to the tree branches to warm them up. Then I selected the white areas onto another color balance layer and increased the blue to make the snow look brighter. The shadow areas on the snow had too much blue tint, so I was able to select those areas onto yet another layer and take out some of the blue to make the shadows look a little more natural. So, in effect, the result is several different white balance settings, which I believe is much more like our eyes would actually see it.
