As part of a new project on which I'm working - "Cold Genius" - I needed to draw a LOT of snowflakes in Rhino, which is possible using a 30:60:60 degree triangle and cutting out chunks, then duplicating and mirroring it and rotating copies around an axis. What a hassle! However, a quick online search brought me this brilliant Snowflake Generator
from Evil Mad Scientist Laboratories. Worth using for the name alone.