1. open map editor
2. place 3x3 overflowing water or lava tiles surrounded by dirt or chasm
3. you will notice holes in the ground
Can you provide a screenshot? I'm pretty sure that this is working as intended if the issue is with the chasm edge overflow tiles, these tiles are specifically meant to be used in conjunction with a water/lava fall and as such have some placement requirements to make them look correct. It's not ideal but is a result of limitations in the tiling system of the game.
Overflow tiles are missing an edge which would normally be present and this allows the lava/water fall to display without clipping through that edge the VFX of the falling water/lava hides the missing edge but if you place one of these tiles without a fall then the illusion is broken.
You are right. They look fine when used to make water/lava fall.
Great I'll close this then. Hopefully in future games if we have anything similar we could make that a little more intuitive :)
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