Why is my tile getting damaged?

[zeidius]

Hey guys, 

 

Anyone ever encountered this? It's pressure damage, but I don't understand why the damaged one...is damaged, and the other ones, on the bottom left corner, don't take any pressure damage. 

 

[Gurgel]

If I see this right, you have a (CO2?) pocket above that tile to the left. That could lead to local "waterfall" type compression and explain your problem. Essentially, liquid gets compressed into a tile faster than it can flow away.

Fix is making sure your liquid surface is the same height everywhere. With the bubbling from the coral, that could be difficult though. Do you need that wall?

[zeidius]

Thanks, this was killing me.  

Yes, the ranch is quite far below my main base so I had co2 pocket just above. I replaced that wall with airflow tiles, I need it in order to stop my sweepers getting the eggs for automated ranching. End product : 

[blakemw]

One thing to note here is that siltstone seems to have really poor pressure resistance. Like siltstone will take pressure damage at a bit over 2000 kg/tile of salt water, coquina is even weaker. In contrast, granite only takes pressure damage at a bit over 3500 kg/tile.

Anyway, for these rocks which take pressure damage at only 2000 kg/tile, that's just two salt water tiles squished together, which can happen really easily even without much confinement when there are bubbles of air rising, the game isn't very smart about how it distributes displaced liquid mass, nor how it diffuses mass from an over-pressurized liquid tile. But it's much harder to exceed the 3500 kg/tile of granite without some serious compression and confinement, it's not something that happens "naturally".

So basically, you can just make anything where pressure damage might happen out of granite, it's really tough. Also rubber isn't much better than granite, it's a little better but it'll still fail at 4000 kg/tile which is absolutely not a meaningful difference. So granite anywhere water might get temporarily compressed and you'll have no or very few problems.