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I am making a time travel effect for a spaceship appearing in the skies. And before the space ship appears there is a clear sky. When the "time vortex" or whatever initiates I would like to create an effect like the minas morgul effect from the Return of the King. Only this one will be with clouds forming and not particle sorcery
http://www.youtube.c...npbxUnw0Y#t=94s
But I don't want to be as high as it is in the movie. But the key effect I would like from this is at the beginning when the "beam" is forming at the base. I have been doing some R'n D in over a week now, and I cannot wrap my head around this
I have tried stuff from vortex force to driving it by particles. If someone could give a kind of recipe of how to approach this it would be great. And when I mean recipe I dont demand a step by steps but some guidelines would be awesome! 
If the way to do this is beyond my skill set I will of course learn the necesary "lore"
If you don't understand what I am aiming for here, feel free to bring the hammer and ask
Thank you vey much!
Until next time
Eirik
