Pressure

Damage starts once the player is submerged, and it grows with depth below the surface. The mod uses the player's depth below air and applies damage in proportion to how far underwater they are, out to around 50 blocks, so small offshooting water caves do not cancel the effect. A depth threshold delays the first damage until a few tens of blocks down, and the armor value affects how much of the damage is taken.

Water with air pockets above the sea level and the surface around y=70 are treated alike, so the effect follows the actual depth of the water rather than a fixed height. The author describes the mod as an experimental attempt at a survival experience, and recommends pairing it with a deep ocean mod for the intended feel. Pressure is published for Forge and NeoForge across three game versions, 1.19.2 – 1.20.6, and runs on client and server.