Exploring some type ideas for a project in C4D. Stumbled upon a technique using Thinking Particles, Mograph Tracer and the HAIR shader (applied to tracer). DOF blur created with ZBlur (BIOMEKK Plugins) which allows for in-camera DOF (as well as depth maps) that doesn’t override other post effects (for instance: HAIR) like the built in C4D DOF does. Hair WILL render with built in DOF, however the depth map ignores the HAIR and blurs it indiscriminately.
The blurred hair creates a subtle smoke like effect.
EDIT: Animation rendered:
And below with the c4d built in DOF effect. Notice how the blur is not applied to the hair where in front of the text object.