You
can combine two or more particle streams by parenting them together.
This has two possible results depending on whether the first particle
stream ends or bounces off an object.
NoteMultiple particles can be parented, but
only in a straight line, that is, a particle can only be the particle
of one other particle. For example Particle 1 can parent Particle
2, and Particle 2 can parent Particle 3 in the same scene.
