Conservation of Mass, Slag, new Refinery mechanics
In SE1, the only real "slag" is large amounts of gravel. I like the idea of rethinking the entire refining process. As production yield works in Space Engineers, it just produces more material from the same amount of ore, without regard for conservation of mass. Instead, what if every refinery produces Slag, with a certain percentage of the possible material extracted. More advanced refineries would extract more material; low-tier refineries wouldn't be able to process more advanced ores at all. This would create incentive to store slag for later, and introduces an interesting new dynamic. The very most advanced refinery, equivalent to the Prototech Refinery in the original game, would not produce any slag whatsoever.
In short, the best Refinery would allow for 100% Yield.
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