Data Mapper
What is it about?
This page covers the Data Mapper modifier of the particle system in Cinema 4D. It maps one particle property onto another — speed to radius, age to color — creating rule-based relationships without any scripting.
This lets you create relationships between different properties of a particle. For example, the speed of a particle can automatically affect its radius or its age affect its color. The following example shows a link between the red component of the particle color and its direction of flight. The greater the red component of the particle color, the greater the speed in the X direction.