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What is the relevance of "Grade" on a material like concrete? Does it impact maintenance of buildings it is part of OR is it somehow more painful/expensive to extract?
 
Started this a while back but it wasn't used. Now the game has been out for a bit I thought it might be worth bringing back as more players might have quick questions which don't need a thread of their own...like me!

Is it possible to leave a Drone Hub's zone of control on the map when dropping buildings? Couple of times I've put things just outside a zone and had to rebuild. Would be good if you could toggle a hub's zone on/off...can you?
 
What is the relevance of "Grade" on a material like concrete? Does it impact maintenance of buildings it is part of OR is it somehow more painful/expensive to extract?
I don't know for sure, but my impression is that it's the ratio of finished product to waste rock produced.
 
Is it possible to leave a Drone Hub's zone of control on the map when dropping buildings? Couple of times I've put things just outside a zone and had to rebuild. Would be good if you could toggle a hub's zone on/off...can you?

I don't know of a way either, but before placing the buildings you get the "Too far from working Drone commander" tip in yellow, so that should help.
If it's a production building and you place it on the very edge of the Drone control zone, then it's possible that the output-depot is outside, which means drones won't empty it, be mindful of that.
 
What is the relevance of "Grade" on a material like concrete? Does it impact maintenance of buildings it is part of OR is it somehow more painful/expensive to extract?

Grade determines yield - so if, for example, a concrete extractor says it produces 20 units of concrete per sol, then, with an average grade deposit, you will get 20 units per sol. If the grade is low or very low, it will produce less per sol, and, if the grade is high or very high, it will produce more. Effectively lower grades produce less per sol, and cost you more energy per unit produced.
 
Grade determines yield - so if, for example, a concrete extractor says it produces 20 units of concrete per sol, then, with an average grade deposit, you will get 20 units per sol. If the grade is low or very low, it will produce less per sol, and, if the grade is high or very high, it will produce more. Effectively lower grades produce less per sol, and cost you more energy per unit produced.
So if the deposit says "800 Grade xxx" no matter what "Grade xxx" is, you get 800 - just possibly more slowly (smaller yield per sol)?