Very easy bro.
Just use surface test.
It has texture option, that you can copy (instance) paste into the operator, and make sure white (or black) parts of the texture is sending particles into the next event.
I usually use gradient ramp and animate UWV modifier itself, animated.
Here's a quick and simple sample, showing how you can do it.
Just use surface test.
It has texture option, that you can copy (instance) paste into the operator, and make sure white (or black) parts of the texture is sending particles into the next event.
I usually use gradient ramp and animate UWV modifier itself, animated.
Here's a quick and simple sample, showing how you can do it.