<P>Precipitation also comes with a SnowZone variant of PrecipitationZone.  It doesn't require anything special to set up, as PrecipitationNodes will spawn whatever type of precipitation is defined by the zone they inhabit.
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<P>If you run around in the accumulated patches, you can leave footprints in the snow.  Footprints are spawned based on ground texture, not the containing zone, so you can have patches of snow spilling into covered areas, or just left over outside from a previous snowfall.  As with the splashy footsteps for rainy zones, this requires a custom player class, and an example of how to use the effect is included in the demo player class.
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<P>This zone also demonstrates the Wind property of PrecipitationZones.  You can use it to add some additional dynamism to your precipitation.