Anyway the engine would have to handle infinite or at least planetary distances (smg. like the distance you can cover in orbit in the duration of an hour - provided you're in low orbit and at stabile orbiting velocity).
A far rendering plane could solve several problems, however huge things (extreme battleships, planet models, planet surface models, jugernauts, knossos like things) will screw with that so a multi-distance multi-category system will have to be used.
If all ships had a base distance to be rendered and a far clipping plane based upon the greatest distance of the ship or model in the actual mission could solve this.
Beyond that distance we won't have render issues, so all we have to store is the koordinates of the ship.
This is no news to coders, but smg. could be done to finally have a more expanded setting - I don't know how this one would fit in with the multiple game-sphere idea, but I don't see the two contradicting each other.
