[Sidefx-houdini-list] Particles birthing from a deleted source

Jerry jerry at axyzfx.com
Tue Dec 2 09:57:19 EST 2008

Check that you don't have pre-roll set on your POP network. You can also
set the particle start time on your POP network so you don't need to delete
your geometry.
> Hello,
> Is there a reason why particles number to be born are accumulating over 
> time before a source geometry exists. For example, I create a grid in 
> sop followed by a Delete Sop with an expression like $FF<100. If I use 
> that as the source of a particles simulation, at frame 101, there will 
> be a lot more particles born then the following frames.
> What I do to avoid that is create an area attribute, promote that to 
> detail and drive the constant birth rate with the "detail" expression to 
> get the amount that I multiplier by an arbitrary number. Particles has 
> been there for such a long time, I'm sure there's a reason why it's like 
> that or maybe I'm doing something wrong.
> Thanks
> François
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