With two modes of snow: "snow" (or "snowfall") and "snowstorm".
EDIT: the script has been added, but there are still things to do:
[x] Make snowflakes semitransparent (either the sprite image, or the snow surface). The transparency should vary randomly when they are falling, and when they fall to the ground they should disappear becoming fully transparent.
With two modes of snow: "snow" (or "snowfall") and "snowstorm". EDIT: the script has been added, but there are still things to do: