I Used Cinema 4D for modeling, texturing, rendered with VRay, composit and post effect in PS. Nebula by Pyrocluster.

Many Components of the Nebula are Needed for creating things, collectors heat up the Nebula-Clouds and the Ships collect the needed parts.
After collecting it, the Collector-Ships fly back to the Rafinery Ship, where the Conversation of the Nebula Components is done. Collectors escort by sensor probes.
The Rafinery Ship is Protected by Gunships, it's Equiped with two ION-CANNON's which are needed to Protect the Ship from heavy Attack

http://dl.getdropbox.com/u/336682/The%20Harvesting.jpg
Original Resolution