Scene rendered with snowman.pov (see below)

Comment: snowman.pov produces "snow" using only Povray 2.0 statements. I derived the falling_snow texture from a texture used by Kari Kiivisalo for spotlights. I modified it with turbulence and mapped it to a sphere. Maybe one could rotate the sphere for an animation. The appearance of the snowflakes depends on the +A (antialiasing) switch of Povray, so please run this file only with antialiasing on.

Here is another picture:

scene rendered with water.pov

The source looks a bit complicated, as I recycled the snow patches of the upper picture to save time.

POVRAY scenes: