I want to create a custom resource that is produce automatically in a factions homeworld. For instance I want to create the resource called Soymilk. I want each faction's homeworld to produce a specific amount say 4. I also want to ensure that to create the larger ships hull, you would need 1 soymilk for each ship. This way, I can limit the amount of the larger classes of ships to a specific number per factions.
Can someone point me to some resources or tutorial on how I can do this? Maybe some tutorial on how to create custom resources and one to show how to edit ship hulls to require specific resources?
Thanks.