Child Emitter
Groups
First of all, you need to create groups for your particles. To do that, you need to go to Simulate->Thinking Particles->Thinking Particles Settings
You can Add/Remove groups using the right mouse button. You can also create hierarchies. After you created the groups, you just simply need to drag it into the Particle Group User Data. You can also modify the view type and color of the particles.
Particle Type
Generate Over Life: When the main particle dies, the child particle(s) will be generated.
Generate On Collision: Set the Deflector Object (Polygonal Object), if main particle collides, child particle will be generated.
Generate Continuously: Generate child particles from main particles at every frame. Remember to set Time Settings as well.
Particle Settings
Set the number of particles, adjust life/speed/size/distance (distance sets an offset for the particles from the original birth position).
Birth Settings
Select where you want to birth your particles from. To use surface/volume option, you also need to set the surface/volume type, and also add the object to the “Object to form” user data.
Emitter Settings
If you select to birth from an emitter, you can adjust it’s shape, and size. You can move/rotate the emitter by moving the Standard Emitter Null Object.
Time Settings
Set the start and end frames, and also, you can how often to emit particles. Use this option if you want to generate trees/flowers with hair.
