I was wondering if anyone knew of a tutorial on how to make a tornado in blender.
I think the main thing is to make emitter which is shooting vertices up and then they are rotated by some object with vortex force field. Last thing is to add motion blur to tornado.
I have been trying to make a tornado too and was unsucessful, so if you get it working, please post a blend, so we can learn from it ;).
Good Luck.