Particle instancing objects do not follow the orientation of the emitted particles

After defining Particle instances in your scene, and running the Particle simulation, you notice that the Particle instancing objets (e.g. primitive cones) are not following the orientation of the particles when played back.

There is a big possibility that the Particle Align on Velocity parameter is disabled.

Simply enable the Align on Velocity parameter :

1. Open the Particle Cloud PPG.
2. Go to the Ptype tab, then to the General tab; under the Rotation Velocity section, check the Align on Velocity parameter.

About the Particle align on Velocity feature :

Softimage XSI-Simulation document : chp 4, page 90.