Particle emission rate

POPs
1

I am attempting to get a finer control on POP particle emission rates. My emission point sources number from one to several points and each has a unique emission rate attribute based on the source point(s) velocity. Ideally I would like for faster moving source points to emit more particle points. However when setting the emission mode to ‘Birth Attribute’ I lose the option to select the time sampling mode (Frames / Seconds) and fractional emission values seem to have no result and I end up with no emission or a much greater emission rate than I want if I push the emission rate to over

Is the ‘Birth Attribute’ emission rate based on ‘Seconds’ or ‘Frames’ sampling ?

My inclination for this would be that the attribute based emission should behave in a similar way that the ‘Birth Rate’ emission works and have similar time sampling options.

thank in advance for any insight or suggestions.

Jeff

2

Ah, never mind. I think I get it now. The Birth Attribute acts more like a boolean on/off with multiplier per point.

J

3

Hello @jammer

That’s it, the Birth Attributes specifies how many particles should be created every frame. The system uses only the integer portion of the Birth Attributes value; any fractional part is ignored when creating particles.