Liquid physics in games is a pain in the ass frankly. None more so than 3D liquid physics.
In WftO, we're going to operating 3 levels stacked onto of eachother.
Which presents the problem of liquids on the top floor interacting with the lower level, and again for the 2nd floor with the bottom floor.
I've created some images to demonstrate the problem:
Liquid stream from level 2 flowing down into level 1 as a FULL tile
If I were to tunnel into the side of the wall, this is the scenario we'd be presented with:
Liquid stream adjacent to an open space
If you're thinking well just get rid of the big liquid block, we'd still have this possible scenario:
Liquid tile (floor) adjacent to open tile over lower open space
A solution to this would be to have an extra layer of rock beneath level 2 and that would be the ceiling of level 1.
Ideas?