So, decided to come back and see what progress had been made. Started an island biome, ferocious neighbours. Everything was going well late into the summer, when I was excavating on my island and accidentally connected with a single tile of the ocean.
Instantly, 4306 items destroyed by water (mostly stone chunks). Aside from water destroying chunks of stone on impact, this was frustrating because I could have easily patched the one hole from above and returned to digging. Sadly, instantaneously, all of my caverns were now considered ocean. Since this locked me out of most minerals and plans for the island, I decided to see what would happen if I patched the hole from the top, dug out a much larger cavern underneath the flooded one and then connected the two. If water was considered to have volume, or if flow rates were a thing, then this should in theory drain the upper chamber and flood the lower one.
Nope, once you are a water tile, you are infinite amounts of water. All caverns completely flooded, everything (including rocks?) destroyed by water. Time to drop this game again. :(
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