SHADOW ITEMS are BACK!!! | Shadow Stack Technology

[@JKM115]

To any Mojangster wathing this video: Please don't fix this. In order to make this work in 1.20.2 you literally need to perform out of memory (OOM) suppression which is so complicated that so far only a single technical server managed to do this, and it's been months since it released. Those explits literally don't affect anyone but our community. Nobody except for us will ever consider making OOM setup to get the shadow items. This is not like the rail based suppressors where any idiot could build one and get a shadow item. No. OOM is unbelievably complex, and requires admin feedback to tune the setup for the server hardware. Fixing this way of item shadowing will not do any extra good for the game, it will not prevent the general community from abusing it, **because they can't get OOM anyway**

[@chickenbobbobba]

ty for writing this jkm

[@Tet_50]

So basically

[@caspermadlener4191]

"Please don't fix it" sounds like it is worth fixing. The comment would work better if it was brought sarcastically "totally revolutionary for every single server with update supression. Actually this is only a single server."

[@se6369]

Are there no ways at all to do this without the help of the server owner or something?

[@ДаниилРабинович-б9п]

@@se6369 I'd imagine there are, but you'd end up crashing the server a few times in the process.

[@chexo3]

Technical minecrafters became so advanced they found a way to trick two different item stacks to refer to the same object in memory, then when it was patched they figured out how to do it again.

[@mo-s-]

They literally did quantum entanglement in Minecraft wtf

[@LiEnby]

Quantum entanglement

[@EnderMega]

Till this day, *I cant belive* they _FIXED_ this. Bro, there are only a few games where I could say that they have "quantum physics", *imagine that you can brag that your game has "quantum physics".* Plus, _as JKM115_ said, almost NO ONE does that AND it was already very technical to execute, so going out of your way to "fix" something that most people dont care is just a waste of time AND MONEY for Mojang.

[@hisamiyomotsu1337]

before the patch, any idiot could set up shadow items

[@EnderMega]

@@hisamiyomotsu1337 1 and? 2 Lmao! No. Its no something you do on accident neither something anyone that doesnt REALLY want to do can. Also, if you really want to crash a server, there are other far better ways.

[@hisamiyomotsu1337]

@@EnderMega 1. shadowing does not crash the server 2. an update suppressor pre 1.19 was quite literally 2 note blocks, 1 dust, a trapdoor and some rails

[@EnderMega]

@@hisamiyomotsu1337 I talked about crashing servers cause the way you pointed you that "its easy" was a problem, but, yes you can crash servers, its a update supressor, it crashes the game + server. Also, you would use a good amount of rails to fill the stack and them cause a update surpression, so I dont know what you are talking about.

[@hisamiyomotsu1337]

@@EnderMega you can, item shadowing inherently does *not* crash it and in fact breaks on crash

[@fx-modding]

We've come a long way. I wish I had enough time to continue looking into it. I remember knowing about the furnace. However I knew it was only as an item stack, and I never thought of using that item stack. I gave up looking for methods after update suppression was patched

[@Igna778]

We realy came a long way

[@onebacon_]

Good to see such a shadow legend here.

[@ax30ma]

I wish you good luck with doing some more stuff like this) That makes TMC even better and amazing to be a part of it

[@adityabadukale6353]

This is the most exciting news ive heard in this version, i literally JUST and i am not joking JUST read there wasnt any shadow item method in 119 in saints of suppression discord

[@soma_donat]

This is awesome. I'll wait for you to release the new OOM suppressor. I'm so excited for it.

[@jmtdvs87]

great video and excellent work! I often wonder just how many different things tech players and servers hide from the public..I totally understand why, but I still wonder...lol

[@JackTheDev]

Based Igna 🥹

[@AstraVoid]

Yesssssss quantum entanglement is back to minecraft

[@micromannn]

2nd best wavetech member for a reason

[@Igna778]

I wish!!! But thanks for the kind words

[@fingius]

Wow, that's sickkk. Great work! Let's just hope now that mojang won't fix this before 1.21

[@lucianjadue1671]

In 1.21 rn, I might be doing something wrong but its not working

[@StalKer-vy9lq]

​@@lucianjadue1671+

[@Cylmxe]

@@lucianjadue1671 maybe update supressor that doesnt work? gotta try someday

[@kaz49]

Mojang is gonna be frantically trying to find and patch this before the 1.21 release date lol

[@enkvadrat_]

Is they really going to patch a bug that litterally requires out of memory suppression to perform? Something that almost nobody would be able to perform on a server

[@JordHaj]

Instead of creating actual content

[@the_stray_cat]

@@enkvadrat_ well it looks super easy to duplicate soo ied think so? they woul not want to give us an easy way to get infanint everything..

[@enkvadrat_]

@@the_stray_cat No, he mentioned you need and OOM supressor if you want to do it in the newest version, which is almost impossible to build. I think you underestimate the true scale of one of those. The shulker supressor he used in the video no longer works in the newest version

[@Tyler.8046]

@@the_stray_cat For context, this is what an OOM Update Suppressor looks like (kzbin.info/www/bejne/jafXdGmPqNWmY9U), and it has to be tuned to the megabyte to prevent crashing the server.

[@ris_kis]

Can't wait for docm77 to use that technique.

[@gavin5410]

I love this channel so much you bring back all the cool shit that mojang removes

[@FelixTeamFortress]

I eagerly await all your future TMC videos, these are incredible.

[@vovakraftmagma1303]

i will say, serching on youtube pointlessly is very usefull for finding videos like this... exactly what i serched for, and now it just pops up on my for you page ....

[@theonlything.]

seeing this in my recommended made me so happy :)

[@JMW1906]

I'm confused, could someone help me out please? OOM suppression implies (as far as I understand it) causing an out-of-memory exception to be thrown, thus aborting the current execution (i.e. tick processing) and rewinding the stack until the exception is caught. If it isn't caught the server should crash. Doesn't that imply that Minecraft uses a try catch all somewhere (i.e. catching all exceptions), even though that is **considered bad practice precisely because it can lead to catching exceptions you did not intend to catch**, like out of memory exceptions or things like SIGTERM? I assume there is no issue with the OOM-Killer or other OS-side memory limitations because we hit the max memory size allowed via JRE arguments. I'm mainly asking because I want to understand if they really used a try catch all or if it is caused by something more complex, potentially due to how the JVM itself works (tbh, I'm pretty sure the cause is a try catch all exceptions block). Random side-thought: Unless OOM based update suppression relies on something even more complicated like causing an OOM, the JVM (e.g. the garbage collector) or Minecraft intentionally catching it, freeing some other memory to make space for the new allocation and due to some other bug having an effect even though the released memory should've been unused. If that is the case: How the hell did you find something like that?

[@Igna778]

They need to catch stuff for making reports about the crash, and they also dismiss them if they are on the packet thread since malformed packets could crash the server if it din't dismiss them

[@linse6388]

your whirling around with your head is exhausting

[@ZÏ̇̃]

What

[@JaviertoZerrado]

very cool, didn't think it was possible

[@marcelmulatixier6867]

I wonder if by using a gold pressure plate some sort of remote control can be made out of the shadow stack. Edit: Sadly, gold pressure plates aren't able to measure the number of items in an item entity. There is perhaps a way to make the shadow stack remotely disappear making a one time trigger but if there is one I don't know it.

[@kingacrisius]

Item stacks always count as 1 entity to a weighted pressure plate, so unfortunately no unless these shadow stacks somehow work completely different.

[@marcelmulatixier6867]

​@@kingacrisius I thought golden pressure plates counted the items in a stack. I guess only one time triggers could be a thing then.

[@kingacrisius]

@@marcelmulatixier6867 I'm fairly confident they don't, but I could be wrong I suppose.

[@marcelmulatixier6867]

@@kingacrisius And you are right to be confident! My tests prove me wrong

[@kingacrisius]

@@marcelmulatixier6867 Cool, thanks for testing, I haven't been able to.

[@SuperLlama88888]

Wow, amazing job again! Hope Mojang keeps it - it would be useless removing it...

[@theceio]

I saw the title, best new of the week

[@TheTroll2001]

This is truely an incredible find.

[@Memessssss]

Bro this is insane!

[@judahomg2188]

When Minecraft adds quantum entanglement…

[@IIIX10]

Ur genius

[@blakexe]

Is it theoretically possible to use the stack on the ground (that can't be picked up apparently?) to make a remote ender pearl stasis activator by throwing one of the items in your own inventory and using a CUD to detect the update in a chest where the linked stack is?

[@Igna778]

yes

[@blakexe]

@@Igna778 lmao I joined your server and started asking this, I found out that CUDs don't detect shadow item changes :(

[@adnzip8198]

ITS BAAAAAAAAACK

[@TheAcorner1987]

Here before docm77 brings this to the hermitcraft server

[@andyjoseph]

Docm77 is about to have a new project

[@LiEnby]

This reminds me of quantum entanglement lol

[@genericplayz6470]

Finally, Allays are useful.

[@theceio]

Im not very informed about this, but could update suppression allows you to combine unique enchants ? (Like mendong and infinity)

[@lacrafty8728]

I wonder if the item “disappears” because there’s no texture for more than 64 items. Like when you drop 1 item on the ground, 2 items, and a stack you can tell the difference because they have different models. Just no model for >64?

[@Sanya_Nub_voin]

4:19 у меня почему-то не получается сделать этот шаг😢 в печь попадет песок. Мак попадает мне в инвентарь. Компаратор выпадает, как и должно быть. Подскажите, пожалуйста, что не так?

[@mo-s-]

Are you playing on Java (PC) or Bedrock (Nintendo Switch, Phone, etc)?

[@Sanya_Nub_voin]

@@mo-s- Java (PC)

[@terraincognita9160]

Привет, разобрался?

[@Piglins]

Great video ❤

[@Igna778]

Glad you liked it!!

[@OmoNok]

POPPY Technology!

[@srleonnar]

Don't let Docm77 watch this

[@GamerBath]

he doesnt need to. He has gotten insider information for weeks and has been teasing about it in his videos.

[@loiman4179]

LET’S GOOOOOOOOOOOOOO

[@jurjen909]

The mouse movements when you talk in first person are quite distracting. It would be better to view when you move the camera less, and just point/look when something is needed in frame.

[@Igna778]

Appreciate the advice

[@krispyking2450]

what’s the carpet command to do the shulker suppression shown in the video

[@Igna778]

There isnt one, this is vanilla

[@byxmix3639]

quantum items

[@mo-s-]

Quantum Items :0

[@SmachnayaBebra]

Dupes in ~2013: activate piston, get any block In 2023: do complex machines, use technics named so that 0.0001% of people now what and do some tricks which doesn't make any sence for ordinary player

[@alexschott9567]

​@ineverknowdoyouHe showed you can dupe by picking up the ground stack and having the other one in your inventory

[@terraincognita9160]

Hello, tell me, is it possible to use this technology to do teleportation, as in previous versions? I am grateful in advance ?

[@the24throguecannon]

is the allay setup duping items here? or just transferring/teleporting them from a remote location and dispensing them to a player

[@the_stray_cat]

duping items from my understanding, which is why Mojang mostlikely will patch it.

[@CodeF53]

Just teleporting.

[@kingacrisius]

It's just teleporting, the chest and hopper setup he put the stack in his inventory into just constantly refills the stack.

[@kingacrisius]

@@the_stray_cat That's not what it's doing, but if you pick up the shadowed stack, then it does dupe the items.

[@the_stray_cat]

@@kingacrisius pretty sure with how he says the alay pick it up it dupes same way as when the player piucks up half a stack it dupes. thats why you cant just use hopers. acording to his words lol.

[@femsilent]

Im working in 1.20.2 here and when I place the comparator on the trap door, once I open the trapdoor it just breaks. Im checking to see if I missed anything but please inform me if I do not reply back. thanks a lot

[@eliyit]

Same thing happens for me

[@hisamiyomotsu1337]

you need a suppressor

[@femsilent]

@@hisamiyomotsu1337 what's that?

[@hisamiyomotsu1337]

@@femsilent update suppressor, like he shows in other videos, it is required to create shadow stacks

[@kyleyoung2464]

DONT REMOVE THIS D:

[@camocamilionOLD]

wow this is crazy

[@EUJokerBR]

You said that hopper break the shadow stack but if you use hopper with a filter with overflow protection, would still break? since it cannot pick up the entire stack, only a portion i imagine it wouldn't break it

[@Igna778]

yea it would still break unfortunately

[@EUJokerBR]

F@@Igna778

[@RinaMara-s6s]

How to make the suppreser

[@connor2094]

bro whats the background music? I need it

[@noobartz0890]

Schrödinger's items

[@-gamingshow8817]

Does it requires carpet mod?

[@danielpalecek4090]

"didn't it fixed in 1.18" no it didn't! the old glitch still works!

[@kingacrisius]

What are you talking about? The old item shadowing mechanic was patched.

[@qone1525]

Nice

[@apersimmon]

Why cant you have one in a chest and one in your inventory? why does it only work if one is an floor item?

[@ZÏ̇̃]

When creating the shadowstack one of the stacks land on the ground. They simply turn into normal items if picked up.

[@apersimmon]

@@ZÏ̇̃ figured something as much, rip.

[@Waffle_6]

music?

[@sugus8467]

With this method does the totem refill still work??

[@Igna778]

not with this

[@lavaskiller8842]

Quantum physics im MINECRAFT WHAT?!? btw I knew they existed

[@authorindisguise5173]

Yeah! Take it Mojang.

[@BetaTester704]

So whats a shadow stack?

[@rednaxela7875]

I read the title as: SHADOW ITEMS ARE BLACK

[@Fej1Fun]

This is sick

[@Vildy]

wow

[@Jouk_]

🤗

[@Giga-Chigga]

Or simply use the force quit dupe strat, which isn't a big deal.

[@kingacrisius]

Duping items isn't the goal, the goal is the connection of 2 different stacks of items.

[@haithemchethouna6363]

Bro did you study quantum physics 😂

[@henry7696]

I have reported this directly to Notch and Team Mine Craft. Expect this to be patched soon. Nothing personnel, kid.

[@riku5543]

skull emoji

[@etuti]

knowing how it works, the mojangs will have to work hard to remove it, because it depends on the OOM of Minecraft. Yes, and Minecraft will get even worse if they fix it, they will mess up a lot of other things. :/

[@etuti]

and also, what's the point of writing to notch about this?.. notch sold minecraft and was not the creator of minecraft for a long time. At the moment this is the main creator this is Jeb

[@kingacrisius]

@@etuti It's just an edgy kid. They didn't actually do anything.

[@AissurDrol]

Please don't bob and spin your camera around while you speak. It is nauseating and makes the video unwatchable.