One of the most exciting features (although there are many) in the new TrapCode Particular update was the to utilize motion vectors which makes it possible to control the particles using motion vector maps.
Here Ron Trevino shows how you are able to render Motion Vectors out of Cinema 4D and using those to automatically generate particles that will be based on the direction of the 3D object’s movement in Cinema 4D.
In this tutorial, Ron Trevino shows you how to get motion vectors out of Cinema4D so that you can automatically generate particles based on the direction of your 3D object’s motion
Ron does a brief introduction of what exactly motion vectors are and how they are interpreted. This is a great walkthrough for creating motion vectors out of Cinema 4D where Ron provides some tips for rendering Motion Vectors out of Cinema 4D, pointing out some areas of concern as he goes.