I'm doing visual effects for the nonprofit indie film "Ikari" and I gotta create an energy tornado effect. I've created a pflow system and have adjusted the speed of the particles to the directors likeing. One other thing he wanted was the particles to dip down faster. I've been playing with vortex helper settings and I got it to dip down faster but it changes the shape of my tornado. Right now its perfect cylinder type tornado but when I adjust the settings to make it dip down faster it fattens up towards the top then its skinny in the middle and then it fattens up again towards the bottom. I've included the Max file if anyone wants to go through and see what you can do or offer suggestions. You'll have to render it in video post, which is already setup with the glows and stuff, if you wanna see it.