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This tutorial is showing how u can emit particle from biped. You can create very good motion with the help of biped and then with biped particle also move same way.

First create biped and give it some motion with the help of *.bip file or create by footstep mode. Create particle flow and change Position Icon to Position object, so that u can choose biped (all part of biped but not bip01).
Remove speed and add Delete operator, put particle life 1.Now change in birth operator and increase particle amount to 100000 or 200000 depending on your system.

this is the render output of this tutorial

High res video for this tutorial is here

Hi..
In this tutorial I try to create very simple rain with the help of Particle Flow.
There is no sound in this tutorial; I try to make it very simple so that even first time user can understand that.
This is beginner level PF tutorial, by doing this you able to understand the basic working of PF
If you have any problem please write to me in comment or mail me at vikas.3(at the rate) gmail.com

Topic Particle Flow - Rain

Level - Beginner
File size 5.43 mb
Time – 4:21

Particle Flow can be control by Particle view, where we create events and in events we have operators (operators define particle properties like rotation, speed, birth rate etc.). When we hit play button PF continually evaluates all events and operators step by step and update the particle system.

How PF works

PF base is particle view where you can edit your Particle Flow.
When you first create PF then in particle view you find a global event. Global event affect all particle in that system, you can add material to it so that each particle having same material in the system. Then after global event we normal or local event start, it usually start with Birth event (Which give birth to particles) then we have other operators which define speed, rotation, shape, display etc.
PF read all the operators in sequence in an event, for example if speed operator is come first against birth event then first speed calculated then it give birth to particle, therefore there is no use of speed and particle stay their only.
We can also apply different test to our particle system which check certain attribute and give dynamic property to particles.
For ex. We can check when our particles collide and also what if particle travel higher then given speed.

Particle’s Life

Yes particles also live their life as we do, they born, do some action and then die.

Birth operator give birth to particles according to the attribute you define, these attributes are when to start and stop creating particle and how many particle will be created.
Position Icon operator define from where new particle emit, here we can define that particle came out from one single point like water coming from tap, or they can also come out from surface like rain from cloud.
Particles remain on emitter, they won’t move at all because their in no force to make them move. Operators who moves particle are Speed and force operators, speed particle use inbuilt attributes to control the speed of particles like Speed, direction and divergence. Where as force operator use external forces (gravity, wind, motor etc.), here we pick force and that force will apply to PF.