Reposted from here (http://www.computercraft.info/forums2/index.php?/topic/25385-snow/)
pastebin get d2dx7i73 (http://pastebin.com/d2dx7i73)
I made snow move. In a very hackish way. But hey, it works!
(https://camo.tmpim.com/192a5c29e3532368d79ba38ef6616651ea50dd9b/68747470733a2f2f63646e2e6b757277612e636c75622f66696c65732f75373358342e676966)