Snow accumulation

Turning the world into another season with a slider! The snow plugin is fed a precipitation rate for snow in mm/h it then creates a snow particle effect with an emission rate that resembles the current snow fall. It keeps track of how much snow has fallen, based on this value a snow depth value is calculated that is passed to the shader. The plugin also allows for setting temperature and other atmospheric conditions that will determine the melt rate. Based on the polygon normal angles the shader decides how much snow a surface will receive, this is then multiplied by the snow depth value to calculate the snow coverage. In the near future a geometry shader could give actual volume to the snow layer. Accumulation and melt rate were sped up for the purpose of this video.
 

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