Blocks placed down in front of firing pistons can produce ghost blocks

I tried to upload a video. It was too large. TPS was 4 ticks when I checked. This glitch has been around for a while, I just never posted anything. I really don't know when it started (which version).

TPS is usually 2 yes?

No, it's usually 20.

Oh xD

You mean where it says 5 ms ticks (now 5-6)

Oh xD

You mean where it says 5 ms ticks (now 5-6)

It isn't that hard of a glitch to replicate if it works for you. Essentially set a piston to a low speed clock, then keep trying to place a block (preferably sand) in front of it. If you use sand, do it in front of a gap/ledge. That way you can tell if it worked (otherwise it will fall).

– Correction:

Try to place the sand in front of the piston right before/as it is extending. if you click and nothing places at all, keep trying to place it slightly earlier each time.

It isn't that hard of a glitch to replicate if it works for you. Essentially set a piston to a low speed clock, then keep trying to place a block (preferably sand) in front of it. If you use sand, do it in front of a gap/ledge. That way you can tell if it worked (otherwise it will fall).

– Correction:

Try to place the sand in front of the piston right before/as it is extending. if you click and nothing places at all, keep trying to place it slightly earlier each time.

No, to find what your TPS is type /debug start then after a while when the ghost blocks appear type /debug stop.

okay

okay

Yeah, as I expected, didn't really depend on that. But it is normal 20.00 ticks per second

Yeah, as I expected, didn't really depend on that. But it is normal 20.00 ticks per second

I think the only real way you can understand it is to get it to work for yourself. It is much easier after the first time (you get it down).

I think the only real way you can understand it is to get it to work for yourself. It is much easier after the first time (you get it down).

Is it possible for you to attach a screenshot of the issue so I can reproduce?

Finally just got the pictures to upload properly

They might help to give you a visual

Finally just got the pictures to upload properly

They might help to give you a visual

That was good timing...

That was good timing...

Is that helpful? If you get it to work let me know, and try placing a block on the ghost one. It will turn to the block you try to place.

Is that helpful? If you get it to work let me know, and try placing a block on the ghost one. It will turn to the block you try to place.

Also this one is easy... it is not the same bug but a major one.

place a block down, any one as far as I'm aware, and then do this when standing on it

/summon minecraft:falling_block ~ ~-1 ~ {Time:200,BlockState: {Name: "minecraft:polished_andesite"}}

it has to be the block you are standing on (the id has to match)

it will also create an only client side issue

I've tested it on a small server before. My friends saw the blocks (possibly only sometimes I don't remember)

It creates an open space that is confused whether you can or cannot occupy the space.

a falling sand entity does fall. Also if you place something like tnt (then glitch it) it will be invisible and partially solid, and can be ignited 

Also this one is easy... it is not the same bug but a major one.

place a block down, any one as far as I'm aware, and then do this when standing on it

/summon minecraft:falling_block ~ ~-1 ~ {Time:200,BlockState: {Name: "minecraft:polished_andesite"}}

it has to be the block you are standing on (the id has to match)

it will also create an only client side issue

I've tested it on a small server before. My friends saw the blocks (possibly only sometimes I don't remember)

It creates an open space that is confused whether you can or cannot occupy the space.

a falling sand entity does fall. Also if you place something like tnt (then glitch it) it will be invisible and partially solid, and can be ignited 

This one should be impossibly easy to replicate

This one should be impossibly easy to replicate

I'm sorry, but I can't seem to be able to reproduce this issue. Am I doing this right (

)? Can you upload the video to a site like YouTube and link it here?

place a block one down in front of the piston so you can place it on a ground surface

place a block one down in front of the piston so you can place it on a ground surface

that should totally help you

let me just say I appreciate your dedication xD that is almost if not impossible that way

that should totally help you

let me just say I appreciate your dedication xD that is almost if not impossible that way

Also don't forget to try the second one I mentioned. You should get it first try just copy and paste the short little command into your chat

and of course stand over the block of falling block choice

the block also doesn't have to float mid air; it can be on the ground

Also don't forget to try the second one I mentioned. You should get it first try just copy and paste the short little command into your chat

and of course stand over the block of falling block choice

the block also doesn't have to float mid air; it can be on the ground

I just added a screenshot with a better angle.

I just added a screenshot with a better angle.

Also this image is possible if one or more blocks of snow to form the golem are ghost blocks.

Also this image is possible if one or more blocks of snow to form the golem are ghost blocks.

I still cannot reproduce I'll ask helpers and mods if they can. For the second one that you mention I'm pretty sure that would be MC-72248.

Just confirmed that upon reloading the world, the ghost blocks will disappear.

Just confirmed that upon reloading the world, the ghost blocks will disappear.

Yes, I just checked. That fits the description. Nice work!

Yes, I just checked. That fits the description. Nice work!

Has this one with the piston to ghost block been reported?

Has this one with the piston to ghost block been reported?

... I just found out if you ghost a slime block, all of the blocks attached to it get ghost clones

update...

yeah there are some weird things going on using slime blocks. noting that

... I just found out if you ghost a slime block, all of the blocks attached to it get ghost clones

update...

yeah there are some weird things going on using slime blocks. noting that

It is not MC-54026 since you are not using slime blocks and you said your TPS is 20.00 so not MC-133187.

^ or better yet attach your world. If your world is too big, use a website like Dropbox and give us the link to download your world.

The ghosting with slime blocks issue is reported as MC-54026.

The ghosting with slime blocks issue is reported as MC-54026.

It isn't so much a mechanism. It is what I used to achieve it. It is a guide. Really all you need to do is place a block in front of a piston right as/before it is firing.

It isn't so much a mechanism. It is what I used to achieve it. It is a guide. Really all you need to do is place a block in front of a piston right as/before it is firing.

I believe this is a totally different issue with the slime blocks. I mean than the one reported before. The ghosted slime block tries to pull blocks along, also ghosting them (not yet figured out how consistently).

I believe this is a totally different issue with the slime blocks. I mean than the one reported before. The ghosted slime block tries to pull blocks along, also ghosting them (not yet figured out how consistently).

Is this a good setup?

Is this a good setup?

If one of the mods can replicate this, make sure they do it with sand for a screenshot (should be floating and ghosted), or just a normal block then (try to) place another block on it (should become the block you placed on ghosted one).

If one of the mods can replicate this, make sure they do it with sand for a screenshot (should be floating and ghosted), or just a normal block then (try to) place another block on it (should become the block you placed on ghosted one).

I suppose

I suppose

nvm no

set the repeaters to something higher

nvm no

set the repeaters to something higher

it is just so that you have time to retry for the next time it extends.

This might be possible in a server where a friend could power the piston for you, but the clock is the only way to do it by yourself

it is just so that you have time to retry for the next time it extends.

This might be possible in a server where a friend could power the piston for you, but the clock is the only way to do it by yourself

Delay of 2, 3, or 4?

Delay of 2, 3, or 4?

The environment is suppose to contain PC details only. Also, thanks @unknown for trying to help. 🙂

Thanks for the Environment fix. The delay does not matter. Preferably something higher to make it easier for you. you could even have more than 2 repeaters if that helps.

Thanks for the Environment fix. The delay does not matter. Preferably something higher to make it easier for you. you could even have more than 2 repeaters if that helps.

The easiest setup to see if you got it right (in my opinion) is sand. So if you are trying to replicate it, it is easiest to use sand.

Again, I've got to thank you guys for being so patient with me. I'm glad you keep trying to replicate this. It just takes precise timing. Almost positive it is frame perfect to get it to work.

The easiest setup to see if you got it right (in my opinion) is sand. So if you are trying to replicate it, it is easiest to use sand.

Again, I've got to thank you guys for being so patient with me. I'm glad you keep trying to replicate this. It just takes precise timing. Almost positive it is frame perfect to get it to work.

Can confirm, I think that I've gotten it to work! 🙂

Can confirm, I think that I've gotten it to work! 🙂

Thank you!

I'm so happy that no one has to keep trying that for another hour xD

Thank you!

I'm so happy that no one has to keep trying that for another hour xD

now try placing a block on the sand

now try placing a block on the sand

solid prefereably

solid prefereably

In fact, I've relogged and the ghost block disappeared as you've said it would. Will try again...

In fact, I've relogged and the ghost block disappeared as you've said it would. Will try again...

Alright, when I got the ghost block to pop back up, I tried to place stone on it, but the stone simply replaced the "block of sand".

Alright, when I got the ghost block to pop back up, I tried to place stone on it, but the stone simply replaced the "block of sand".

Oh... woops

Well it should be much easier now that you got the timing

Oh... woops

Well it should be much easier now that you got the timing

nice work!

nice work!

now let me say now that nothing will update the block. it only disappears completely or is replaced

now let me say now that nothing will update the block. it only disappears completely or is replaced

now if you like, to understand it better, you could try the slime block with it now. You'll have to place a block next to the place-down point

to see if it clones it as I said earlier

now if you like, to understand it better, you could try the slime block with it now. You'll have to place a block next to the place-down point

to see if it clones it as I said earlier

So I guess that's it! I truly can confirm this bug.
_{I truly appreciate how kind people can be on this bug tracker, it means so much. It's not every time that you get to go out of your way just to make someone's day, so those opportunities are so valued. Thank you all for your great effort, keep up the good work!} 😃

So I guess that's it! I truly can confirm this bug.
_{I truly appreciate how kind people can be on this bug tracker, it means so much. It's not every time that you get to go out of your way just to make someone's day, so those opportunities are so valued. Thank you all for your great effort, keep up the good work!} 😃

Yay! I am happy. Yeah it has been in the game since I don't even know when.

Yay! I am happy. Yeah it has been in the game since I don't even know when.

@unknown, can you provide a video so I can reproduce? I'm probably not timing this right...

Yeah, there are a lot of weirder things that come from interactions with these ghosted blocks, but it would never happen without the bug in the first place. So it of course should be under the same thing.

Yeah, there are a lot of weirder things that come from interactions with these ghosted blocks, but it would never happen without the bug in the first place. So it of course should be under the same thing.

It is a very precise timing as I'm sure carpet0928 could tell you. With 30 fps on MC and recording, I don't think it would be of much help. Also it is difficult for me upload anything because of the file size restrictions. 

It is a very precise timing as I'm sure carpet0928 could tell you. With 30 fps on MC and recording, I don't think it would be of much help. Also it is difficult for me upload anything because of the file size restrictions. 

But some tips...

hmm...

try placing it when the piston is extending. Then, because obviously that won't work, make it VERY slightly earlier each time. until you get it.

But some tips...

hmm...

try placing it when the piston is extending. Then, because obviously that won't work, make it VERY slightly earlier each time. until you get it.

If you place a normal block instead (PLEASE USE SAND), try slightly later.

Also... you can push ghost blocks with other ghost blocks (and normal ones)

Forgot to mention this... supporting the only client side (theory), entities other than the player will appear to land on the sand blocks, but a moment later show that they never actually interacted with it (they fall through it). Observers also do not detect when these ghost blocks are moved, but do detect when they are replaced with normal ones.

If you place a normal block instead (PLEASE USE SAND), try slightly later.

Also... you can push ghost blocks with other ghost blocks (and normal ones)

Forgot to mention this... supporting the only client side (theory), entities other than the player will appear to land on the sand blocks, but a moment later show that they never actually interacted with it (they fall through it). Observers also do not detect when these ghost blocks are moved, but do detect when they are replaced with normal ones.

@unknown, I don't think I have any software capable of recording Minecraft gameplay.

@unknown, I don't think I have any software capable of recording Minecraft gameplay.

My advice is to just keep trying, but if it is too frustrating, don't worry about it. Carpet already got screenshots other than the ones I provided. And he knows how to replicate the glitch consistently.

My advice is to just keep trying, but if it is too frustrating, don't worry about it. Carpet already got screenshots other than the ones I provided. And he knows how to replicate the glitch consistently.

Are you guys clicking the piston's head or the block in front? I'm not giving up yet.

The block in front. That is why earlier I said to place a block down to place on a "ground block"

you can also place on the side of a block but I find it easier on the ground

I wish you luck. Let us know when you got it. Screenshot club too; gotta join it haha

The block in front. That is why earlier I said to place a block down to place on a "ground block"

you can also place on the side of a block but I find it easier on the ground

I wish you luck. Let us know when you got it. Screenshot club too; gotta join it haha

Click on the lime block.

Click on the lime block.

Unrelated but, I also reported a very strange bug of sorts involving blocks and entities reverting to where and how they were before. It didn't include all blocks in the area strangely. broke/changed half of my command block system Anyway, I haven't had any word on how that progress is going. Not that it is a big deal, but if you can, could you ask about it? The only thing I'm concerned about now is whether or not I can use the world, or if I should leave it alone until I have more information on how to handle it.

Unrelated but, I also reported a very strange bug of sorts involving blocks and entities reverting to where and how they were before. It didn't include all blocks in the area strangely. broke/changed half of my command block system Anyway, I haven't had any word on how that progress is going. Not that it is a big deal, but if you can, could you ask about it? The only thing I'm concerned about now is whether or not I can use the world, or if I should leave it alone until I have more information on how to handle it.

Can confirm, too. I only managed to get it to work with sand, tho, which seems really strange to me.
<video removed due to autoplay, see attachment instead>

Also the things you are discussing here are normal properties of ghost blocks, which is a result of them being client side only.
Sand does not fall, because only the server removes the block from the world and spawns a falling block entity.
It's gone after reload because the server does not save it to the world as it doesn't really exist.

I think you guys have done a fantastic job of replicating this, and also simplifying my explanation of it. However, you can get it to work with any solid block that does not get destroyed by a piston attempting to move it. For some interesting results, I'd suggest slime blocks (very strange)They appear and disappear after being pulled by other slime blocks (Upon updating the area the blocks were in) Additionally, while server-side entities (not the player), cannot actually interact with the ghosted block, it is clear that any blocks that are affected by gravity are held up by ghost blocks.  They are not and only appear to be momentarily Ghost blocks also do not cause updates ex. observers, BUDs. Only replacing the ghosted block with another will cause an update.

Just some fun thing to mess around with, I'm sure there are some things I missed, but most of the major things are covered.

*Note: I tried to get a video of the crazy train of ghosted slime blocks (and other attached blocks), but could not get the video to work.

I think you guys have done a fantastic job of replicating this, and also simplifying my explanation of it. However, you can get it to work with any solid block that does not get destroyed by a piston attempting to move it. For some interesting results, I'd suggest slime blocks (very strange)They appear and disappear after being pulled by other slime blocks (Upon updating the area the blocks were in) Additionally, while server-side entities (not the player), cannot actually interact with the ghosted block, it is clear that any blocks that are affected by gravity are held up by ghost blocks.  They are not and only appear to be momentarily Ghost blocks also do not cause updates ex. observers, BUDs. Only replacing the ghosted block with another will cause an update.

Just some fun thing to mess around with, I'm sure there are some things I missed, but most of the major things are covered.

*Note: I tried to get a video of the crazy train of ghosted slime blocks (and other attached blocks), but could not get the video to work.

I've saved the structure that I've used to reproduce to a datapack (

) in case anyone has trouble trying to reproduce this issue in the future.