Came across this cool little free plugin for Cinema 4D called GreyCloud which is a Python plugin for Cinema 4D R12 that generates particles based on the black and white information of an image, or image sequence. A pretty cool effect, and it is free. Check out and download the GreyCloud Plugin for Cinema 4D at 908Lab here.
From 908Lab: “This is a preview of the GreyCloud plugin we programmed for Cinema 4D. The Plugin generates particles (thinking particles) based on the black and white information of a image sequenz. White is close / black is far (or other way around) 🙂 With mograph you can add geometrie to the particles or use thinking particles. you can download the plugin at: 908Lab.de“