We now record a little data about it chunk at load time, so we can use it even after we've changed that chunk.
We now record a little data about it chunk at load time, so we can use it even after we've changed that chunk.
Revert "We now record a little data about it chunk at load time, so we can use it even after we've changed that chunk."

This reverts commit 6fb2c1764dda3c2187ed5210a3e67d85ac0fd0c9.
Now we use  the per chunk data to create a sort of 'net of bedrock', a connected structure that covers the whole world.