The snow is not painted white, but is the watercolor paper which is left unpainted. Using a #4 round brush, we will simply add a wash of diluted Ultramarine Blue in various places on the white paper to add shape and shadows. Place the shadows near the base of the mountain, under the tree and the bunny. Add some drifts in various places to give shape to the snow. Using Ultramarine Blue, paint in the bunny tracks. We will let this dry and then add our snow flakes.