Using just CC Particle World and C4D Lite, this tutorial shows how to create a set of rocks hanging in space which you can fly through. No external plugins needed!
I use a series of Nulls to generate a line of particles using CC Particle World. Normally this is not ideal as CC Particle World particles can interact with each other and cause flickering. My technique avoids this. Then I generate random particle textures using an image and Turbulent Displace to generate rough, rocky shapes. Finally I head into Cinema4D Lite and use a Landscape object as a foreground rock.