This page provides information on the Phoenix FD Birth operator for Particle Flow.


This Particle Flow operator creates particles based on the fluid parameters.

The birth probability is a function of the fluid parameters and is determined by the corresponding diagrams.

You can improve the viewport performance of this operator by increasing the PFlow Cached Frame Count option in the Phoenix FD Global Preferences, However, this will increase the memory usage.

UI Path

||Particle View window|| > Depot > PhoenixFD Birth

||Particle View window|| > Event Display right click menu > New > Operator Event > PhoenixFD Birth



Phoenix Simulator node – Determines which Simulator will be used to read the fluid data from.

Start | start – The first frame at which the birth of particles begins.

Stop | stop – The last frame at which the birth of particles ends.

Rate | rate – A multiplier for the birth probability.

Seed | seed – An initial value for the random numbers generator.

Combine | combine – The method used to combine the diagram for Temperature, Smoke and Speed.

Add – The values are added.
Multiply – The values are multiplied.
Biggest  – The biggest value is selected.

Temperature/Smoke/Speed/Fuel | use_t,use_s,use_v, use_f, td,sd,vd,fd – Diagrams representing the birth density based on each source channel.

Reset – Resets the corresponding diagram with its default content.

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