Myren Eario | When you suppress too many block udpates... @myreneario7216 | Uploaded 6 years ago | Updated 2 hours ago
Minecraft version 1.13.1
In an attempt to fix tnt duplication, mojang has severely limited what kind of block updates get send out by pistons.
Here I show a particularly interesting case.
If a piston wants to pull a slimeblock structure, then he has to delete his piston head before he can properly evaluate whether the slimeblock structure is movable. (Before deleting the piston head, every slimeblock structure would be unmovable because an unmovable piston head would be in the way)
In order to prevent any kind of duplication bugs, there will be no block updates (no NC, no PP, no whatever) immediately be send out when the piston head gets deleted. These block updates will only get send out after the entire structure has been moved.
However if the structure is unmovable, then the entire structure will never be moved, and these block udpates will simply be forgotten.
The funny thing is of course, that even if this would send out block updates immediately it would cause no duplication glitches, because the piston head gets deleted before the piston has made the list of blocks it wants to move.
Edit: A very similar bug was apparently known before.
There is this video by methodzz in 1.13-pre11: youtube.com/watch?v=obgQM45f76c
However these bugs are not completely identical. If you test any of the setups methodzz shows in his video in 1.13.1 they will no longer work.
In 1.13.1 you additionally need the two slimeblocks and the obsidian block I have in my video (or some other immovable slimeblock structure), or it won´t work.
Minecraft version 1.13.1
In an attempt to fix tnt duplication, mojang has severely limited what kind of block updates get send out by pistons.
Here I show a particularly interesting case.
If a piston wants to pull a slimeblock structure, then he has to delete his piston head before he can properly evaluate whether the slimeblock structure is movable. (Before deleting the piston head, every slimeblock structure would be unmovable because an unmovable piston head would be in the way)
In order to prevent any kind of duplication bugs, there will be no block updates (no NC, no PP, no whatever) immediately be send out when the piston head gets deleted. These block updates will only get send out after the entire structure has been moved.
However if the structure is unmovable, then the entire structure will never be moved, and these block udpates will simply be forgotten.
The funny thing is of course, that even if this would send out block updates immediately it would cause no duplication glitches, because the piston head gets deleted before the piston has made the list of blocks it wants to move.
Edit: A very similar bug was apparently known before.
There is this video by methodzz in 1.13-pre11: youtube.com/watch?v=obgQM45f76c
However these bugs are not completely identical. If you test any of the setups methodzz shows in his video in 1.13.1 they will no longer work.
In 1.13.1 you additionally need the two slimeblocks and the obsidian block I have in my video (or some other immovable slimeblock structure), or it won´t work.
![Overview of 1.12 Population Supression Bugs [Falling Block Episode 1]](https://i.ytimg.com/vi/KU3lN1IUhuE/hqdefault.jpg "Overview of 1.12 Population Supression Bugs [Falling Block Episode 1]
Summary: 1. Redstone dust has a global flag that can be set to false, and then redstone dust doesnt power blocks anymore.
2. You can fully load the area around an unpopulated chunk without populating it. Unpopulated chunks are invisible.
3. To turn on instant tile ticks you do not need thousands of rails. 4 observers in a circle are enough to update supress the liquid pocket.
4. There is no way to get instant tile ticks in the end dimension.
5. While instant tile ticks are on, tile tick blocks do not work if they are less than 8 blocks away from unloaded chunks.
World Download: https://www.mediafire.com/file/ro3dr7b8a426ogd/1.12+Population+Supression.rar/file
Credits:
Most of the things in this video are not solely my own research, but were collectively discovered during falling block research.
Falling block research was done during the last 2 years by:
Cheater Codes, coolmann, cortex, Earthcomputer, invokespecial, Kerb, Kman, Matthew Bolan, Myren Eario, prgmTrouble, punchster2, skyrising, Sylkos, Xcom6000
References:
Dungeon generation by Panda4994, KaboPC and DanielKotes: https://www.youtube.com/watch?v=9iaU1TvIQqM
Update supression by Panda4994 and RedstoneSpire: https://www.youtube.com/watch?v=mzfLHNeqjuY
A helpful guide to update supression by Xcom6000: https://www.youtube.com/watch?v=IJhZpK-8p54
Panda4994s unlisted video about instant tile ticks and instant falling: https://www.youtube.com/watch?v=rjoaEOhIV6E
Instant tile ticks by cool mann: https://www.youtube.com/watch?v=hViDrnDCIwc
Barrier block by Earthcomputer, Kerb and Cheater Codes: https://www.youtube.com/watch?v=zQUBR8dSUlA
Cool manns video on falling blocks: https://www.youtube.com/watch?v=VTbpUjK-A74")
![Generic Method for Falling Block Swaps [Falling Block Episode 6]](https://i.ytimg.com/vi/N1TuhgjUkc4/hqdefault.jpg "Generic Method for Falling Block Swaps [Falling Block Episode 6]
Edit: Instead of this video you can also watch the following video by JKM: https://www.youtube.com/watch?v=PI2LPZaL5To
It gives a slightly less detailed explanation with superior audio quality.
Previous description:
You can now get command block items in 1.12.2 survival.
World Download: https://www.mediafire.com/file/koftyzijxbwegul/Generic_Method.zip/file
(world download got updated on 25.6.2022, because the contraption had some bugs)
Video explaining Word Tearing on Registry Palette: https://www.youtube.com/watch?v=b-TLpc5oyhg
Video explaining how to do a chunk swap: https://www.youtube.com/watch?v=8-AumLja16A
Litematic for JKMs Chunk Swap Setup: https://www.mediafire.com/file/6640f2fsesjoop1/JKM+Chunk+Swap+Setup.zip/file
(liquid pocket locations need to be adapted to each individual world)
1.12 Carpet Mod: https://github.com/gnembon/carpetmod112
If you need any help with falling block contraptions you can ask in the Threadstone Discord: https://discord.gg/JNSreKhuGd
Some small details I forgot to mention or only found out afterwards:
1. After getting two async lines and reclustering the glass chunk, you need to turn off the instantfalling flag before you can do the generic method. To turn off the instant falling flag you can just populate a chunk in a different dimension. So for example if you do the chunk swaps and the generic method in the overworld, then you can turn off instantfalling by making a player fly to ungenerated chunks in the nether or the end.
2. When you try to get the falling chorus plant block, you need to put another chorus plant next to the location where the falling block gets created, because otherwise the chorus plant block that gets created through word tearing will just destroy itself.
3. The contraption that uses registry word tearing for creating the chain command block needs to be used with shulker boxes that have no nbt tags on them, otherwise it can crash the server. You can see whether a shulker box has nbt tags on it by using the F3+H advanced tooltips. A shulker box from a crafting table will have no nbt tags, while a shulker box that was placed down and mined again will have nbt tags even when it is empty. So make sure to use the contraption with freshly crafted shulker boxes that have never been placed down.
Credits:
Falling Block Swaps were discovered by:
Cheater Codes,
Cool mann ( https://www.youtube.com/c/coolmann24 ),
Cortex ( https://www.youtube.com/channel/UCWUTIqvf3878isEEYm5Xckg ),
Earthcomputer ( https://www.youtube.com/c/Earthcomputer ),
Kerb,
Myren,
Punchster ( https://www.youtube.com/channel/UCi3kLDpZPS0J2VzgGE0cgYg ),
Xcom ( https://www.youtube.com/user/Xcom6000 )
Word Tearing was discovered by 2No2Name: https://www.youtube.com/user/Its2No2Name
Figuring out how to get two asnyc lines was done by JKM: https://www.youtube.com/channel/UC9l5EFLX3Dc1NhBiYjcswmQ")
