In general the white of watercolour paper serves well
for covering snow - except where it is in shadow, when the snow takes
its reflected colour from the sky. This colour relationship links the
sky to the scene on the ground, helping to make the painting unified
and therefore hold it together.
In wintry landscapes
the sky tones are deeper than those of the snowy foreground.
When the countryside is covered
with an unbroken blanket of snow the foreground can lack incident and
interest but you can remedy this in all sorts of ways. A few twigs sticking
up out of the snow or ruts appearing in the snowy ploughland, are just
two examples. Do not, however be tempted to overwork these foreground
details, as they can reduce he impact of the snow.
Shadows cast by trees just outside
the frame of the painting can also add interest to an empty foreground,
and their form can help describe the smooth undulating contours of the
fallen snow. Tonal contrast decreases with distance, and therefore the
tones required for the distant trees, ruts and so on are diluted to weaker
versions of those in the foreground.