The basic idea is this:
Clay, particularly ball clay in rivers, is near impossible to secure, and acre clay is really easy to grief away entirely, just pave or grass the entire mudflat.
So, there needs to be a way to secure river/lake clay, and recover acre clay.
Thus, my suggestion is this:
Clay pits.
It would be a large structure (I am thinking 11x11) That would need to be built in the radios of the q point on any terrain. It would:
- Only be build-able in the overland level, clay pits in caves are just silly.
- Lock out anyone from digging the clay point it is affiliated with, by just digging. They would have to right click the clay pit and select 'dig clay.'
- Completely drain the q point when it is built.
- Completely drain the q point when it was destroyed.
- Like a mine, require higher end components to build, and ideally, be harder to build.
- Use the max q of the q point, perhaps with a q bonus based on the clay pit q.
- Possibly require being built on village authority, to prevent griefing or random q point claiming.
- Perhaps have it have a chance of producing grey clay when digging up ball clay.
(Oh, it should be obvious that it produces clay based on what type you built it on)