Hi all,

Trying to join some expressions to start and stop a particle system but not sure what to use where, this is what i have so far….

$F > 250 & %2 == 1 $F > 300 == 0

Basically want the system to start at frame 250 and end at 300 but only work every 2nd frame. Checked the textport with exhelp but nothing coming up for joining expressions maybe brackets…

Cheers

You could just keyframe the birthrate.

If you wan't to use expressions this
if($F>=250 && $F<=300 && ($F%2==0),1.0,0.0)
works.

I use it for the Const Activation.

Thats what i was going for, needed the if statement/brackets.

Cheers

you don't need if, just the correct logical operators
it should work just like this:
$F>=250 && $F<=300 && ($F%2==0)