Hi,

when using the mining drones mod, the drones are also mining the depleted placeholder ores. I am not sure if the issue is in this mod.

I have two ideas which may solve this quickly:
* Make placeholder ores require some random fluid which is not obtainable
* Make the result of the ore something random which is not used anywhere and set the mining probability or amount_max to 0

Thanks :)

I used "prospector fluid" at some point to prevent mining but I forget why I removed it.

I thought about writing a function (within Peppermint Mining) to determine if an ore is mineable at all by checking all mining drill prototypes. That really would be the best solution, but it would have to be done on the side of Mining Drones.