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Terraria’s most obscure and weird mechanic… air pressure!



Terraria’s most obscure game mechanic – air pressure
Yes, it is an actual thing that affects fishing… slightly

#terraria #laboroflove

Desmos:
https://www.desmos.com/calculator/odlstntams (atmo)
https://www.desmos.com/calculator/weoke7zvf2 (fishing power)

Music:
Vanilla Calamity Mod Music – “Starry Ascent” – Theme of Space by Heart Plus Up!

Mods, Pack, Shaders –
Foundry & Alchemy (Pack) – https://steamcommunity.com/sharedfiles/filedetails/?id=2440505684
Lights And Shadow (Mod) –
https://steamcommunity.com/sharedfiles/filedetails/?id=2670628346
Fancy Lighting [Ultra Preset] (Mod) – https://steamcommunity.com/sharedfiles/filedetails/?id=2822950837
Atmospheric Torches (Mod) -https://steamcommunity.com/sharedfiles/filedetails/?id=2817496179

Credits:
By Aero Icarus from Zürich, Switzerland – 145ea – Flash Airlines Boeing 737-3Q8; SU-ZCF@CDG;11.08.2001, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=27016528

Terraria’s most obscure game mechanic – air pressure

View 50 Comments

50 Comments

  1. Terrasteel on

    Note 1: Air *is a fluid*. A fluid is “a substance, *as a liquid or gas*, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape” (dictionary.com). It’s a broad term.
    Note 2: use the desmos if you want to explore for yourself. Your values will vary from mine by quite a bit!
    Also, to get the surface value you need Tedit. Due to out of bounds stuff you can’t just fly up to space and check

  4. Dhalin on

    Clicked on the video thinking you were gonna tell me something I already know about the weird way in which air seems to exert way more pressure than water does when it comes to how water flows and how water absolutely refuses to flow upwards, not even the tiniest bit, even if there are thousands of gallons of water pushing it through a narrow tube with a tiny opening at the bottom. Was pleasantly surprised what the video was actually about.
    EDIT: Also I've seen some pretty small sky islands that were only like 5×40 blocks of water which would only be about 200. Thankfully, they all work partly thanks to this mechanic.

  7. Rickfernello on

    My theory is that it's part of a joke on fishing; I think one of the goals of the devs were to make fishing in terraria as complicated and unnecessarily complex as possible.
    The amount of needed water, time of the day, phases of the moon, bait used, rod used, equipment used, potions used, luck factor, altitude, block placement, air pressure, biome, chum bucket decay… All of these are factors for fishing. It could be as simple as biome, rod and bait lol

  12. Ellie Johnson on

    Modern terraria updates are adding in more and more seemingly pointless features that most players appreciate eventually, things like gembunnies that are functionally useless but look pretty, or the princess NPC.

    I'm guessing when they were adding fishing, they spitballed every possible factor that could impact it and just added most of them to the game. Air pressure was probably programmed as a mechanic, half-implemented (hence its almost functionally useless impact) and then never expanded.

  13. Kozel (☭) on

    How to fish in Terraia everywhere: use an hidraulic press to get H2O @ 376 atmo, and you will be able to fish direcly from the palm of your hand (if you manage to prevent the pressure bursting the now solid cube)

  17. m0mmyluver on

    wait so wtf is air is air just oxygen or is air just the stuff that isnt filled in by physical objects so can you have oxygenless air? what is air guys

  19. Ryan Eyster on

    This was likely implemented for sky island fishing. If you had to create a sky lake because your world didn't have a floating lake, it would suck to cart up 300 buckets of water without a bottomless bucket.

    While this was probably implemented for simple mechanical reasons… pressure DOES have a huge effect on the behavior of water. Essentially, what keeps all water from spontaneously boiling off is the vapor pressure. Water molecules at the surface of a container spontaneously evaporate/boil and with a higher vapor pressure, most of these molecules have the tendency to condense and fall back into the liquid state. Some inevitably escape, hence why water evaporates even at room temperature. With low enough vapor pressure, the water will lose molecules more quickly. Eventually, the vapor pressure is equal to the atmospheric pressure, and gas can spontaneously form below the surface. We can lower the vapor pressure by either heating the water or by reducing the ambient pressure.

    If you boil water at sea level, it may take 5 minutes. If you boil the same amount of water on top of Pike's Peak, it will only take 3, and on top of Everest, it takes a minute.

  22. Harms on

    Anyone who thinks air is not a fluid can fight me… Or just pick up a dictionary/take a basic science course.

  27. DasIrrlicht on

    Not a player, but I got a weird theory:
    Maybe affecting fishing in high altitude is just a side-effect?
    Maybe the intend was to stop you from fishing deep underground since it is based on height, and nobody ever fixed it because it is just fishing anyways?

  29. Sir Pootsman on

    i think they added this for the sake of the fishing quests, there's not much water on the floating islands it would be too hard to get the fish, there's a lot of water underground so it would be too easy.

  30. SephirothsBIade on

    I have no idea if I have been clickbaited or not. This sounds so ridiculous that there should be no reason for it to be in the game. But I also dont fish with exactly enough water….normally it is significantly more than was ever needed because lol water duplication go brrrr

  32. NaT on

    What if they added water pressure which damages you the deeper you go in the ocean? Would be a disaster tbh

  35. Jimmy Gore on

    It actually has to do with the fishes ability to sense atmospheric pressure. Rising pressure sends fish moving around cover and in lower depths, before the pressure tops out and fish become lethargic.

  36. True Blue Flare on

    My guess is that it's this way so that if you want a fishing pond in a space base it doesn't have to be massive and vibe breaking or some shit

  39. Pan Limak on

    Liquefied air is produced cryogenically, at -196°C. Pretty sure it's a gas when it's not a liquid, and there was no context for you referring to a liquid. You made a goof, don't hide behind semantics. Just have a laugh and move on.

  40. IMAVG on

    I think the reason for this is sky lakes since I’ve seen some that generate pretty small and I don’t think that they want new players needing to make a whole fishing spot for quest fish because their sky lake is too small

  45. Brancu! on

    Tell me what you want, but as far as my experience goes, fishes DO have sense of pressure and it can realy depend if the fish take or not.

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