LE Rain drop shader layer

[vinniewryan]

I would like rain drops to accumulate on windows during storms and foggy weather. There must be a way to insert a shader, perhaps in effect.txt, into the enb render for the 'window' layer. I'm not sure if those effects can interact with Skyrim's weather variables or not.. It must be possible. GLSL is too simple, and so, I don't get it.