this post was submitted on 08 Sep 2025
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Fuck, this is a thing in ksp and for the life of me, I can't remember the term. Instead of asking the global brain, I came here to say, I hope you have a good day.
Kraken is the term.
Krakens are physics glitches which generally get worse the deeper into space you are. Some craft are designed to be 100% kraken powered and don't even have engines onboard
Interesting knowledge for an optician.
I've known astrophysicists who played KSP who wouldn't have known that.
KSP is my 2nd fave game behind Civ 5 with 3500 and 4500 hours respectively
Dang, I think my highest time on steam is Eve with something like 1800 hours. (I'm not sure if there's a way to track how much time I've spent in Minecraft or classic Everquest (given that I no longer have a subscription to the latter)).
Its... a bit more complex than this... but basically, the reason why the simulation tends to act more insane the further out in space you are, is because of you are getting closer to the limits of floating point data type precision used for location coordinates.
Literally the simulation error becomes greater and greater the more extremely distant you get from the world origin point, basically the rounding errors get worse.
You end up with different parts of what is supposed to be one big connected thing... having different amounts of error applied to them, to their locations... so your craft will tend to... lose local relative spatial coherence, then the constraints in the physics system try to react to this kind of error by pulling or pushing things apart, then that calc also suffers rounding errors, then this all starts an uncontrollable feedback loop and runs away into an angry ball of madness convulsing and whiplashing at seizure inducing levels.
I remember switching from 32 bit KSP to 64 bit KSP significantly allevisting this problem, way back in the day.
But you are also correct that many things are designed to kraken at basically any distance near or far, and... mostly this is done by intentionally utterly overwhelming the physics engine with waaay too many concurrent collisions or elastic connections to attempt to process at the same time, but there are also a bunch of other 'wierd tricks' that ... basically are 'Super Effective' against peculiar weaknesses of the physics engine.
This is why there are mods that do things like simplify various parts (usually very small ones) down into just having a totally perfect, non wobbling, non elastic connection to their adjacent parts, to reduce the overall physics compute cost.
Also, just generally, game engines tend to have a hard time with rotational momentum in 3d, as compared to lateral translations in 3d.... especially when an object ... or conglomerate object... does not have its weight uniformly distributed.
You wanna make a game physics engine cry?
Try spinning (extremely fast), that's a neat trick!