I was just wondering if there was a way to control particles, in such a way that they all emitted simultaneously. I am attempting to make a geometry to collapse unto itself, or from the bottom upward like a building implosion. Any help would be greatly appreciated.
Thanks
Jeremy

Hi there,

In the Source POP, use “Impulse Activation” instead of “Constant Activation”.

“Impulse Activation” will birth the number of particles (Impulse Birth Rate) every frame so if you're not careful, you'll get lots of particles in a short period of time.

“Constant Activation” will birth the number of particles (Constant Birth Rate) over one second instead.

Please remember to turn off “Constant Activation” if it's not required. Of course, it depends on the effect you're looking for.

Let's say you would like to emit all particles on frame 50 so in the “Impulse Activation” parameter, you can use

$FF==50

which sets the parameter to 1 only on frame 50 & 0 for all other frames.

Or you can keyframe the parameter if you're not comfortable with using expressions. Please note that any value above 0, even if it's 0.0001, will cause particles to be birthed so please make sure the function curves are 0 where it is not required.

I hope the above helps!

Cheers!
steven

Thanks…had a little brain lapse…guess if I had stood back and thought about it for a second it would have come to me. But thanks for the help, now I'm sure to always remember. :wink: