World Generation General

[still steppe]

fix this too

another person was talking about an app here.

but if you know how to use cheat engine then I can give memory address

[sly forge]

never used cheat engine

[sly forge]

that cant really be fixed

because Mojang made those features inaccessible

i cant exactly fix the ice issue either to my knowledge

[still steppe]

then you will need to rely on third party apps. but if 512 is your wanted limit then why dont you use overworld height limit thing provided by mojang

[sly forge]

only allows for void worlds

[still steppe]

your one is literally overriding default biomes

[sly forge]

also what apps?

[sly forge]

nope, its not

you cant touch how vanilla biomes work atm

im currently on win11

[still steppe]

he posted one here. I dont know that mod personally though

[sly forge]

thats a mod not an app

eh whatever i'll just ask lucy how to install it and customize it

how do you install and customize it?

i need to know because this will help to solve a major issue im having

[old minnow]

You could've Amethyst

But it doesnt support +1.21.0.3

[sly forge]

i never knew how to get amethyst

[sly forge]

damn

im on .62

[old minnow]

Just install the launcher lol and download mods

[still steppe]

or you can download cheat engine, use some youtube videos. when you are ready then I will send the memory address.

[old minnow]

Also possible tbf

[still steppe]

bcz that mod seems to be hardcoded for 2048 height

[sly forge]

i probably will when i have time

[old minnow]

Yeah, you should be able to change it to anything

[sly forge]

i dont want to download a launcher just to fix a bug for a vanilla instance

[old minnow]

But the world format only supports a height of 4796 or so

[old minnow]

Whats the bug?

[sly forge]

my terrain is attempting to go above max world height

i need to figure out what the theoretical maximum height is

[still steppe]

i got another app

[sly forge]

there is no calculator for molang that i know of for this

[old minnow]

There are a few molang interpreters

[sly forge]

any that can find the maximum possible value?

one that could visualize as blocks would also be nice but

low chance that exists

[old minnow]

Just iterate over like a 2048^2 area

Tbf you'd need to impl your own noise fn iirc

Or you find an interpreter that supports it

[still steppe]

for app you can contact @shut holly

[old minnow]

My man max

[still steppe]

@sly forge to fix height limit, set value from 319 to like 290 to be safe

[sly forge]

dammit

it needs to support molang

also 2048 is WAAAY too small

i need 25k

[sly forge]

already planned on it

[still steppe]

and ur files has syntax errors

this is correct. distribution object was missing

[upbeat barn]

I believe distribution is for certain format versions no?

[upbeat barn]

And no, multi line is allowed last I checked for molang.

[still steppe]

ok

[still steppe]

those started working without experiments?

i didnt know that though.

[shut holly]

А ?

[shut holly]

Sub-Chunks above 2048 will not be saved after relogging the world

[sly forge]

theyre identical

im just using multiple lines to make reading the code easier

this would only be an issue if it was in the feature rules file

if there was a real syntax error, the biome map wouldn’t generate at all

there are no errors

[sly forge]

wrong topic

this isn’t world height

the topic wasn’t even about minecraft in that case

me and Lucy were talking about a molang interpreter

2048 refers to x and z in this case, not y

[subtle plinth]

So world gen in worlds with custom height limits works?

[sly forge]

only if you modify the game using unofficial means

[subtle plinth]

Oh

[acoustic horizon]

Can I add some sort of mini-biomes to the end

Like bits of grass with trees and plants and all that

[velvet spade]

I use moss patch features to do that and for the foliage part i use a aggregate with weighted randoms works pretty well but can be blocky at chunk boarders. i use the aggregate for the feature rule to place and some features place aggregates or weighted random to give some kind of random coherence to it

If that makes sense

[crimson sequoia]

Does this cover ore generation

[old minnow]

yeah easily possible

combine some scatter and aggregate features for something simple

and if you want more control use the existing custom biome template

[crimson sequoia]

I wanna know more about uhh ore generation

[acoustic horizon]

What custom biome template?

Also thanks peeps for answering <33

[old minnow]

have you never used it?!

[acoustic horizon]

Never

[old minnow]

give me a second to find the template...

[upbeat barn]

What about it?

[crimson sequoia]

How does it work exactly, does it need to be a structure generated

[upbeat barn]

Nope, not a structure, just using the ore feature.

https://wiki.bedrock.dev/world-generation/custom-ores

[crimson sequoia]

Oh

[velvet spade]

There's one that chungus made it adds quite a bit of terrain. I've been trying to make anything place using something similar and I'm getting nowhere so far lol

[delicate trench]

https://discord.com/channels/523663022053392405/1170534497855479810 haven’t been keeping up with addons but I see no reason why this would break, should still work perfectly

[junior orbit]

Hello! Im curious how I might do something like this.

I am trying to spawn single_blocks, via feature rules.
But i would like the blocks to spawn at different stages! Just like the cocoa beans.
I know we dont have access to states when placing single blocks via features.

Any suggestions for how i might do this?
Maybe just have a custom_component onTick that sets the random block state when block is loaded in? or onPlace? does the onPlace get invoked when placed from a feature rule?

@upbeat barn Hey any idea about the above, when you have a second!
I figured you might use custom_component, unless there was something easier!

[still steppe]

you can either make the block use onTick component. but if you dont want that the event keeps running for life then you can make an intermediate block that does onTick. This block would replace itself with target block after that

[upbeat barn]

You should be able to access states via world gen.

[junior orbit]

Hmm, I checked out the single_block, and found this

https://learn.microsoft.com/en-us/minecraft/creator/reference/content/featuresreference/examples/features/minecraftsingle_block_feature?view=minecraft-bedrock-stable#example

And here is my version:

{
  "format_version": "1.21.30",
  "minecraft:single_block_feature": {
    "description": {
      "identifier": "ts_nc:plants/bushes/blueberry_patch.single"
    },
    "places_block": [
      { 
        "block": { 
          "name": "ts_nc:blueberry_bush",
          "states": { 
            "growth_stage": 0 
          } 
        }, 
        "weight" :  5 
      },
      { 
        "block": { 
          "name": "ts_nc:blueberry_bush", 
          "states": { 
            "growth_stage": 3 
          } 
        }, 
        "weight" :  1 
      }
    ],
    "may_replace": [
      "minecraft:air"
    ]
  }
}

But getting this error "unknown child schema option type. Allowed types: "

i changed the version to 1.21.30
Do I need to change that anywhere else

[haughty gull]

Only the format_version changes to 1.21.40, the block randomization option only works in that version

[subtle plinth]

I just learned something crucial about jigsaws. If the structure is not specified to not spawn in the end it will spawn in

[sly forge]

thats not limited to jigsaws

[subtle plinth]

You have to actually put in the file a thing telling the game to not put it in the end otherwise it just places it there even if you only specify a few biomes. I’m not sure about the nether though

[sly forge]

ALL world generation works this way

its silly ik

[subtle plinth]

That’s dumb. If you tell the game over world and overworldgeneration it should only place it there

[sly forge]

ikr

its

so stupid

[subtle plinth]

I can’t wait for spawn overrides to come to jigsaws

[junior orbit]

That seemed to work! But for some reason i am only ever seeing growth stage 0 or 1.
Never 2 or 3.

Using this:

{
  "format_version": "1.21.40",
  "minecraft:single_block_feature": {
    "description": {
      "identifier": "ts_nc:plants/bushes/blueberry_patch.single"
    },
    "enforce_placement_rules": false,
    "enforce_survivability_rules": false,
    "places_block": [
      {
        "block": {
          "name": "ts_nc:blueberry_bush",
          "states": {
            "ts_nc:growth_stage": 0
          }
        },
        "weight" :  5
      },
      {
        "block": {
          "name": "ts_nc:blueberry_bush",
          "states": {
            "ts_nc:growth_stage": 1
          }
        },
        "weight" :  4
      },
      {
        "block": {
          "name": "ts_nc:blueberry_bush",
          "states": {
            "ts_nc:growth_stage": 2
          }
        },
        "weight" :  3
      },
      {
        "block": {
          "name": "ts_nc:blueberry_bush",
          "states": {
            "ts_nc:growth_stage": 3
          }
        },
        "weight" :  2
      }
    ],
    "may_replace": [
      "minecraft:air",
      "ts_nc:blueberry_bush"
    ]
  }
}

Also, when i try to adjust the json. to only spawn with either stage 2 or 3.
it defaults to 1. and now every bush is stage 1. Not even 0...

This is the state on my block
"ts_nc:growth_stage": { "values" : { "min": 0, "max": 3 } }

Weird. No matter what i try, not able to spawn with stage 2 or 3. And as i mentioned. If i strictly try to spawn with stage 2 or 3. every bush defaults to stage 1. Any ideas?

[small latch]

with jigsaw structures yes

but biomes in a whole no

[small latch]

I know its the the feature for the tree itself, Its like a diff feature tho

look into the files for it

I seen it while changing the oak one, Since there is the version with vines

and knocked over trees

[subtle plinth]

You would probably be better off with features for that

[tiny idol]

Has there been anything about creating custom biomes? Any news or updates on that front?

[upbeat barn]

No.

[tiny idol]

[grizzled rune]

is the wiki for biomes actually properly updated with the fact that it says biome gen is entirely broken?

[upbeat barn]

Correct.

[hushed knot]

Can I make Custom Biomes?

No. Custom biomes have been broken since 1.18. Mojang is fully aware of this and working hard to bring back this capability.

Here is the bug report: https://bugs.mojang.com/browse/MCPE-100700

Mar 26, 2025, 12:01 AM

[junior orbit]

Having an issue finding the up to date vanilla files so that i can check for the oak tree feature differences. like @small latch suggested.
Trying to find the single_block_feature that chooses between oak tree variations. But the most recent versions i have go up to 1.21.30. I assume the feature changes i need are on 1.21.40

Found 1.21.40 but i dont see any additional features / rules here either.
Am I looking in the correct spots?

[still steppe]

just get from installation folder

[patent kindle]

anyone know any reliable work arounds to making custom biomes?

[upbeat barn]

I would just wait.

[patent kindle]

😭 ive been waiting for yearsss

[subtle plinth]

imagine they drop custom biomes next preview

[still steppe]

its experimental right? just create world in experimental. load terrain as needed and then turn off experimental by world edit

[subtle plinth]

alright so all jigsaws break when moved into the preview

[small latch]

Uh, There is a post somewhere on here with them

[small latch]

Ah yea true

[small latch]

They might of added a new code to them? Or they just broke the old code and dont care

[small latch]

none

Custom Biomes are long dead

[subtle plinth]

they did but there is no documentation on them so im kinda just guessing

[small latch]

I would suggest finding a post on the feedback minecraft channel that talks about it and upvote that

since more upvotes for us to have custom biomes, Mojang might fix it

[subtle plinth]

nah im just gonna look at the java files and do that

[small latch]

Wasnt much before either tho

[small latch]

So, The entire worldgen folder thingo is just from java?

Like the way the json was coded for bedrocks version?

[subtle plinth]

yeah

the entire thing is essentially identical

[small latch]

Dang

[subtle plinth]

the vanilla java trial chambers dont have startheights 💀

[sacred perch]

Im trying to do something using only commands.
Can the place feature command work with any of the cave carver features?

Or are they only used in scripting?

[sly forge]

ooo thats an interesting question

might wanna test it

[subtle plinth]

big jigsaw bug

sometimes they spawn with out mobs even if they are supposed to

[subtle plinth]

these guys all spawned in the floor, the mob spawning is goofed in about 10% of the structures

[acoustic horizon]

Is it possible for me to do like... floating islands sort of generation but with huge islands & islands on top of other islands?

Kinda like in the nether where there are multiple layers?

[sly forge]

ʍoɥ ʍouʞ ʇuop ᴉ ʇnq ǝɹoɟǝq ǝuop uǝǝq sʇᴉ

[velvet spade]

Upside-down lol

[sly forge]

lnɟǝɹɐɔ ǝq os snoᴉƃɐʇuoɔ oslɐ sᴉ snɹᴉʌ ʇɹǝʌuᴉ ǝɥʇ 'sǝʎ

[subtle plinth]

Australian text

[velvet spade]

Lol sure

[weary forge]

How to stop features from spawning on places that spawn with vanilla structures?

[old minnow]

possible? Yes

hard? Yes

[acoustic horizon]

Any good first steps? What’s the right way to go

[old minnow]

I'd say since such complex logic is more than just simple tiling etc, it might be good to first write a sort of prototype outside of bedrock

it definitely requires some more complex noise generation etc, so you should definitely first read about stuff like what is perlin noise and octaves, both of these will be essential

[subtle plinth]

jigsaws dont generate until in sim distance on realms

interesting

[sly forge]

structures in general are like that

its really weird and makes no sense

[sly forge]

question: is it possible to 100% guarantee that two structures have exactly the same x and z coordinates while having different y levels?

[subtle plinth]

Jigsaws it is

[sly forge]

i want two different jigsaw structures on the same x and z

so no

[subtle plinth]

You can by setting the salt, separation, and spacing values to the same in the structure set files, the structures will spawn on top of each unless the structure spawns underground or something like that

I discovered that by accident when two of my structures always spawned on top of each other

[subtle plinth]

trying to learn how to get jigsaws to work in the new versions

[subtle plinth]

im pretty sure this thing is just completly broken, ive tried for a hour to get this thing to work on the new version and no matter what i do it just doesnt

ive tried the java ones, ive tried random things, and so many other things and it just wont work

[sly forge]

what i mean is i want, say, one to spawn at y 50 and one at y 30

two completely different jigsaw structures

[subtle plinth]

Yeah you can set the start height to that

[sly forge]

are you trying on preview?

[subtle plinth]

In 1.21.80 I think it will be possible for the start height to be set to the same value

[subtle plinth]

Yeah because set y levels are not possible until 1.21.80 from my understanding

[sly forge]

…preview IS 1.21.80

wdym

oh wait

nvm

i silly

strange tho

[old minnow]

it is

[subtle plinth]

It seems the new pool_aliases field allows for one template pool o be selected for a structure which is how trial chambers only pick one type of melee, small melee, and ranged to put in spawners

I also think I figured out wtf was wrong with my structures and if the java jigsaw wiki page works for bedrock then it seems I may not need the start height at all anymore and I can straight up remove it

[sly forge]

that seems a little strange…

id think itd be necessary

removing it will probably make it generate at any y level

[subtle plinth]

I think the height map projection fixes it

[subtle plinth]

i swear it is broken, ive added all of these, ive tried different ways to test it

nothing works

i cant not get any of this to work

i just dont know what to do, the dosc dont come out, the logs are about as useful as nothing at all and they aren't in parady with java so the java files are useless

[subtle plinth]

yeah, im gonna stop wasting my time on something im never gonna get to work, gl with that guys

[summer iris]

"start_height": {
            "type": "uniform",
            "min": {"absolute": 1},
            "max": {"absolute": 2}
        }

[subtle plinth]

im gonna change the dimension padding down to 1, the max_distance_from_center to 100 and im gonna add pool_aliases as a empty field to see if that fixes it along with that

well it worked, not sure if it was the height thing or the changes i did to the other things

[vale cliff]

Is jigsaws working correctly now

[subtle plinth]

They work in stable and preview with the experiment yeah

[real fiber]

Do feature passes run in order of add-ons installed?

As in if I have underground_pass features in an add-on, and so does vanilla, if vanilla is below my add-on in load order, vanilla runs underground_pass first?

[upbeat barn]

I am pretty sure it's alphabetical order reagardless of pack.

[spring thistle]

anyone know how to fix this

[patent kindle]

have i heard correctly, are custom biomes finally being fixed??

[subtle plinth]

Yeah

[spring mantle]

anyone know how "grounded": {} works? In "feature_rules"?

I can't seem to find information on it

or does "grounded": {} already mean it's supposed to work

[real fiber]

Where's this news?

[subtle plinth]

https://discord.com/channels/523663022053392405/1359193021752807576 here i think

[real fiber]

grounded makes the structure fail to generate if any of the bottom blocks are above air

[spring mantle]

Okay thanks, I was reading up on bedrock dev wiki https://bedrock.dev/docs/stable/Features#minecraft%3Asequence_feature, but I don't know if I can even use any of these, do you know perhaps?

[real fiber]

You can use any of those.

What are you trying to do?

[spring mantle]

So I already got it my structure to generate throughout the world, but I'd like to test for a flat surface so that it doesn't look out of place, right now it easily create a 90° edge carved into the terrain or sticking out

and I also would like to get a feel for what is possible

[real fiber]

You can use structure voids to make your structure blend in better

If you add grounded and unburied, that will make sure it's on the ground and not buried

You can also save some landscaping in your structure file so it fits in better

And offset it into the ground a bit

[spring mantle]

Does anyone know if I can switch up the feature that gets placed based on the biome? (Like in the same feature rule) Just trying to see if I can make it more compact

Also how the heck does distribution work? If I have it at 1, suddenly my structure gets placed everywhere, 0.8 same -> 0.5 a bit less but still everywhere -> 0.2, it suddenly does not spawn at all, like what the heck?

[upbeat barn]

What exactly did you change?

Iteration, scatter chance, x/y/z

[spring mantle]

Edit: Found the issue and fixed, thanks for the help!

[wooden meadow]

{
    "format_version": "1.19.0",
    "minecraft:dimension": {
        "description": {
            "identifier": "minecraft:overworld"
        },
        "components": {
            "minecraft:generation": {
                "generator_type": "void"  
            },
            "minecraft:dimension_bounds": {  
                "min": -500,
                "max": 500
            }
        }
    }
}

does this still work and can i make the height building to -50 to -20000?

[spring mantle]

Also other question, can I use a "test" that accepts only one biome instead of having to rely on "has_biome_tag"

[upbeat barn]

No.

[upbeat barn]

Still works however, the range is -512 to 512

[wooden meadow]

Wait

Can I make it -1032 to 1032?

[upbeat barn]

No.

[dense crow]

@subtle plinth I have a question why can't I assign multiple spawn biomes to a jigsaw structure? Is it a bug or am I wrong?

[subtle plinth]

You can just it is really finicky

[sly forge]

not that it works properly

[sly forge]

unburied doesnt work

[subtle plinth]

I think the only jigsaw fields we are missing now are use_expansion_hack, spawn_overrides, and liquid_settings

[spring mantle]

How come sometimes my structures generate in a way that "obstructs" trees and cuts them off, but other times they're completely fine and generate into them? Is it because "minecraft:structure_template_feature" generates at the same time as "minecraft:tree_feature"?

[subtle plinth]

Do you have structure void blocks in the structure?

[spring mantle]

only bottom layer, so that couldn't be it

[subtle plinth]

Interesting, it might be because it is a feature and those get buggy sometimes

[spring mantle]

I'd like to make an addon with structures generating, is this something I just gotta deal with (use structure voids to avoid trees being obstructed from generating) or is there any workaround?

[subtle plinth]

Structure voids would work but I think jigsaws also have very little problem with trees and stuff

[spring mantle]

can you use them in addons? since they're experimental

[subtle plinth]

yeah, jigsaws can be used you just need to turn the experiment on when making a world

[spring mantle]

can I make something spawn on the surface, but only if it's above 90 y level? and if yes, how do you combine those in one condition

[upbeat barn]

You can in iterations use Molang: q.heightmap(v.worldx, v.worldz) > 90 ? 1 : 0.

[spring mantle]

Thank you!

[sly forge]

they can only generate at the same time if that is how you set up the structure feature, if they do generate in the same pass, its because some trees are higher in the alphabet and some are lower

[vale cliff]

Anyone pls tell me how to see what I did wrong on bridge

[small latch]

Yes, Its not fully great as its in a preview for now

But eventually it will be fully done and work like before (I heard its just a sub-biome tho)

[vale cliff]

Anyone pls tell me how to see what I did wrong on bridge pls pla

[spring mantle]

is it dependend on the name of my structures / features? So I can just name all my stuff "z-" somthing

[strong tendon]

Does query.block_has_any_tag not work on features and feature rules? Tried using it on my feature and it says 'unrecognized token'

[muted phoenix]

@upbeat barn Have you had a look at the minecraft:overworld_height component with custom biomes? It doesn't seem to do anything on my end

It looks like custom biomes just copy the height of the biomes they are replacing?

[upbeat barn]

Yeah, to my knowledge, the only thing that works is the climate, tags, and the surface param.

[muted phoenix]

Okay great thank you

Saved me a lot of time

[upbeat barn]

I'm sure you already know the answer, but just in case for any future people, it does not no. What are you trying to do?

[strong tendon]

It's part of a bigger system that assigns an id to each islands in the end dimension.

[upbeat barn]

Ah interesting, I presume you're utilising block tags to assign the feature/feature rules then?

[strong tendon]

Yes, if a neighboring block already has an ID, it will copy that ID, otherwise, it will choose a random one. I'm not familiar of any database for molang so I'm using block tags

[stuck forum]

is it posible to add features to vanilla biomes?

in non experimental stuff

[upbeat barn]

It is yes. I recommend learning about the basics of features/rules.

[stuck forum]

alright if its not experimental and can target non custom biomes thats all i needed to know thanks

[upbeat barn]

Yep, it's stable and can be placed in vanilla biome.

[olive ridge]

Is there a good way to place a block only if it touches air on at least one face?
I've tried using the may_attach_to property in a single block feature, but it seems to require all faces to be air even with "min_sides_must_attach": 1

[sly forge]

sounds like a beetle

[olive ridge]

what???

[sly forge]

a beetle is a bug

smh

silly

its probably a minecraft bug

[olive ridge]

no, a beetle is not a bug, bugs are a separate order

apparently someone documented it (but not very well) on the wiki

[sly forge]

not if its digital its not

:3

theyre both ones and zeroes if theyre digital

[spring thistle]

anyone experienced with noise can yall help

im trying to make my end dimension more stable and its not going to well, it takes a decent while to load into the end

[olive ridge]

you'll have to provide more details

[spring thistle]

hold on im gonna create a zip with all the files used in the noise

might be a min

[olive ridge]

I'm not downloading ur code

explain what you are doing and I can help you find what's making it run slow

[spring thistle]

i redid the entire end dimensions generation lack of better words i have absolutely no way to explain it without showing the code (i edited a template you posted in dev resources a while back)

[olive ridge]

Is there any chance I can override the chorus plant feature rule so that it's placed only where I want it?

[olive ridge]

yeah there's probably not much you can do to make it run fast then

[haughty gull]

No, you can only remove the chorus plant

[haughty gull]

If you are using variables, change them in temps, and try to use the least amount of temps possible

[undone junco]

How do new custom biomes work?

[strong tendon]

Is there a limit to scatter extent?

{
    "format_version": "1.21.0",
    "minecraft:scatter_feature": {
        "description": {
            "identifier": "bao:example"
        },
        "places_feature": "bao:blocks/brick_block",
        "iterations": 9025,
        "x": {
            "extent": [0, 95],
            "distribution": "fixed_grid"
        },
        "y": 90,
        "z": {  
            "extent": [0, 95],
            "distribution": "fixed_grid"
        }
    }
}

This setup only places a 32x32 area.
Using a range of [-16, 95] extends it to partially cover a 48x48 area, but not entirely.
Wrapping it in another scatter that starts at -16 for both X and Z completes the full 48x48 coverage.
Even when setting the parent scatter to start at -24, the placement still only spans 48x48.

[olive ridge]

try making iterations larger than needed

there's a weird bug where large iterations will give up near the end

[short gyro]

hey, have you managed to fix this? for some reason, some of my features that are larger than 10x10 are loading this way on my add-on, even with random rotation set as south

[tiny idol]

I confess that when I left it in the north, the amount of trees cutted was greatly reduced

Sorry for my english

[short gyro]

oh, I guess there's no way to fully fix it

[short gyro]

no problem, english is also not my primary language

[tiny idol]

I don't think so, Minecraft is kind of buggy

[sly forge]

...why are you using a grid of 96 by 96 for something that appears it can be done with 16 x 16

[sly forge]

yh its a minecraft bug that still hasnt been fixed, it makes you wonder why features became stable

[strong tendon]

No, this is just a simple test. I want to place a bigger feature with the size of 96 blocks. I noticed at first that it doesn't complete the whole thing so I tested with just a simple 96x96 square

[strong tendon]

Didnt work sad

[sly forge]

i see a problem with your multiplication

[strong tendon]

Yes lol, I noticed

[sly forge]

try 9216

[strong tendon]

Tried that too and it still only fills until 48x48 blocks

[sly forge]

i thought that limit was only for structures...

very well

just use 48 x 48

[strong tendon]

I guess I could split them in parts. Each block coords has a calculation that depends on the center of that 96x96 though.

Thanks for the responds, still

[sly forge]

have you tried -48, 47 yet?

probably wont fix it but

[strong tendon]

I will try that later

[raw abyss]

Are custom biomes still broken?

[supple abyss]

https://learn.microsoft.com/en-us/minecraft/creator/documents/biomes/biomeoverview?view=minecraft-bedrock-stable
New tech!

[velvet spade]

Is the example In there for stable or is it in preview still?

[upbeat barn]

It was introduced in 1.21.80.

[velvet spade]

Huh. I must not have read that part. I'm still unable to get my pack beyond 1.21.50. Keeps giving me the same errors with all my wood types

It tells me it needs the icon component which I'm not sure why

[olive ridge]

I'm working on a world gen feature generator rn. Does anyone have any ideas for new feature types I should add? (other than the vanilla types and conditional lists)

[sly forge]

inversion features, can place tree features upside-down

idk i just thought itd be funny to see upside-down trees everywhere

[velvet spade]

Yes. Something similar to the lava/water pools features maybe like a mini swamp pool

I made script trees idk if that's similar or not or if your actually using placable features

[sly forge]

ah the legacy lake features

[hard cipher]

the jigsaw doesn't work if it's in a subpack?

I added it to a subpack and the game didn't register it, it's like the files don't exist

Does this happen to just me or to everyone?

[olive ridge]

This isn't really feasible unfortunately

[sly forge]

aw dang it

custom tree feature styles?

[subtle plinth]

thats kinda dumb

i wish did

[olive ridge]

This is definitely possible, however it would take a lot of work.

[hard cipher]

use in a subpack? I would like that too

[velvet spade]

I mean if yall can help figure a way to place them besides a janky workaround I've been working on that with scripts actually.

[olive ridge]

does height_distribution in growing plant features accept molang?

[ivory escarp]

Am I able to set a block's state with the Jigsaw block's turns into section?

[pulsar rivet]

Do Biomes fall under world generation?

[subtle plinth]

I don't think so until we get the jigsaw_replace processor from java

[ivory escarp]

yeah i ended up figuring that out after a few grueling hours

but my structure finally works

so

[stuck forum]

whats the best way to add feature like worldgen stuff given features are experimental?

[subtle plinth]

Features aren’t experimental as far as ik but jigsaw structures are

[stuck forum]

oh, um i was looking here so it must be outdated as it does say experimental https://wiki.bedrock.dev/world-generation/feature-types#ore-featureshttps://wiki.bedrock.dev/world-generation/feature-types#ore-features

[subtle plinth]

Yeah I think a lot of the world gen areas on that are outdated

[sly forge]

they have been out of experimental since 1.20.30 released

[stoic owl]

I have a large structure 64x64 that I want to spawn naturally, since structures using the features can only extend 32x32 this doesn't work, that is why I have created a block that when spawned ticks and then spawns the structure using script.

Issue with this is that the tick only happens when you are close to the structure, is there any way to make it so this works even on larger ranges since it breaks the whole automatically generated structures vibe if a huge thing just appears in front of you.

I thought this is the same approach as mentioned here, but I don't think this is viable

[sly forge]

no they can go to 48x48

you might be better off waiting for jigsaw to hit stable for this, but you can also use feature trickery

[stoic owl]

but aren't commandblocks also distance bound?

[sly forge]

read the edit

i didn’t read everything mb

[stoic owl]

no worries

do you perhaps know how to workaround this to at least make it seem a bit more natural?

[sly forge]

unfortunately no

but there are ppl here who might

[subtle plinth]

Jigsaws have terrain adaptation and /locate support but they are experimental

[stoic owl]

If the structure limit is 48x48 how come all my 48x48 structures stop generating at 32x32

[sly forge]

¯_(ツ)_/¯

[subtle plinth]

Because of chunks in game

[stoic owl]

Okay, so I want to approach the spawning of structures like this:

Since my structures are larger than the correct bounds for features (without using jigsaw blocks), I want to spawn in a dummy entity once the feature is loaded into the world.

The issue right now is that the entity is not being saved inside my structure, meaning I might need to use command blocks. The problem is, I don't really know how I can make my command block only summon one entity once it is placed into the world, since when I place it down to save my structure, it will run automatically.
What could be an approach to make this work?

[old minnow]

why not use jigsaws?

[stoic owl]

Marketplace

[old minnow]

Using entities can be quite ugly and cause a bad user experience, I don't have the data on me, but I assume jigsaws will release to stable within the next months

is it that urgent?

[stoic owl]

yes, basically need it asap

I will most likely replace it once the jigsaw feature is public

Only real way is to generate most of the structure and then generate the rest on a tick

[old minnow]

I see, any details you can share? You might be able to pull of some magic via features and some molang logic

[sly forge]

nope

it was delayed due to a critical bug

[subtle plinth]

jigsaws? Because of the funny linking bug i would assume.

[subtle plinth]

make the command in the block play a function which summons the mob then deletes the command block with /fill or /setblock

[sly forge]

the big one is that jigsaw isnt following terrain

[subtle plinth]

the terrain matching things work fine, the problem is that rigid features dont connect to terrain matching ones correctly

[sly forge]

wdym

ive seen images, the center point follows terrain but everything else remains on exactly the same y level

not only that but theres a lot of features missing

[subtle plinth]

ive tested villages and stuff and the roads match the terrain as normal villages do but the houses sometimes bug out and float, thats the problem ive been seeing

[stuck forum]

how does feature placement work?
My current understanding is that all features tied to a biome are called once per chunk and fed the chunk bottom center coordinates (those would be what the distribution x y z parameters would be when all set to 0. Is that correct?

[civic gazelle]

i think the evaluation of chunk coords starts from the north-west corner

southwards is positive z

eastwards is positive x

By the way is anybody having issues with aggregate features not placing other features in the same location?

[stuck forum]

but the rest was correct right? I'm trying to figure out how to place a feature equally distributed in a chunk so i would need a scatter with the right distribution but thats onlyrelevant if i now where the position is initially. Also not sure what "scatter_chance" is

[civic gazelle]

scatter chance with a value of 50 will mean that any chunk has 50/100 chances of spawning that feature and start iterating.

@stuck forum

if you put iterations to 1 and x, y,z all to 0 you will get 1 block in each chucnk placed in the northwest corner

[stuck forum]

that all adds up. thanks. Odd name for scatter, spawn chance would have been better

for aggregate features can the place features be inlined?

alright so this will make 2 attempts per chunk with uniform distrubiton across all axis and will all be below 64 blocks the chunk min y

[stuck forum]

just tried aggregate and they seem to work for me

in same place (idk if its exact, not relevant for my feature). tho i noticed sequence ones dont spawn the second one

[stuck forum]

I have a single block feature. whats best way to place a block below it?

[stuck forum]

how do i place a specific block permutation in a single block feature?

[small latch]

Jigsaw structures!!

[small latch]

Jigsaw is pretty stable (Not the best standerds for stable, but its still usable)

[small latch]

Ive had problems with all my jigsaw structures floating in the air, Or spawning on the most stupid ares (like one block off a ravine but the entire structure is on the crack of it) and spawning on a hill making it look strange

[supple abyss]

You use the states property.

{
    "format_version": "1.21.70",
    "minecraft:single_block_feature": {
        "description": { ... },

        "places_block": {
            "name": "minecraft:vine",
            "states": { "vine_direction_bits": 14 }
        }...

[stuck forum]

did you figure this one out too or is it written somewhere?

we dont even have access to the vanilla worldgen data files

[supple abyss]

figured that one out, lul

world generation documentation is probably the worst offender

[subtle plinth]

Yeah I have the same thing

[old minnow]

its written in the bedrock wiki

[old minnow]

we do

[stuck forum]

Well wasn't wrtte on the single block feature page, nor it's object type was referencing to the correct type of the field, seeing that it apparently supper a blockstate, a weighted list of block or a weighted list of blokcstates

[stuck forum]

where can i get those? I looked in the 1.21.80 samples and it only contained these types

[old minnow]

download bds

then it'll generate the vanilla data necessary

[stuck forum]

thanks

[oak cipher]

you can also check this out
https://discord.com/channels/523663022053392405/1324376503848275980

[subtle plinth]

I hope we get the vanilla jigsaw files soon

[broken salmon]

Does anyone know which placement pass the new leaf litter and related are getting added in? I have some flowers of my own getting added but leaf litter is getting added on top of them

cool can't find it in program files, the scatter feature is exposed but not the actual feature placing it

guess because it's getting placed with the tree's

[dull obsidian]

so you got the same problems?? i have thse when i try to make a procedural village :((

[small latch]

yea that too

I hate the fact most structures clip inside other things

[small latch]

Do you know if its fixed in the preview, Or if its going to be??

[subtle plinth]

No idea

[small latch]

aight, Hope this problem gets fixed tbh

Since I dont at all understand Features so ive relied on Jigsaw Structures for all structures

[sly forge]

this is the reason jigsaw was put back under experimental

it’s a major bug

[subtle plinth]

Jigsaw docs got updated with 1.21.80 stuff

[jaunty kestrel]

can you actually create custom biomes now? or are they still broken

[subtle plinth]

Technically yes

[sly forge]

kinda

they only work like the pale garden biome for now

so only variants

and its preview only atm

[subtle plinth]

Until today possibly

Nvm

[hard cipher]

Finally

[subtle plinth]

PSA: All jigsaws are broken effective 1.21.80

[sly forge]

w h a t 💀

[subtle plinth]

they no longer spawn, you need to add the new fields to their files to spawn them again

[sly forge]

ohh

so they arent broken lol

i thought you mean jigsaw itself stopped working

[subtle plinth]

yeah no

they still work

just they need updating

[subtle plinth]

well roads still overlap each other weirdly

they arent supposed to do that

[sly forge]

wtf 😭

[acoustic horizon]

How to fix tree structures getting cut?

[sly forge]

is it happening at chunk borders?

[strong tendon]

what if yes

[sly forge]

set extent to -16, -1 instead of 0, 15

its not a perfect fix but its the best we have til jigsaw's issues and features get ironed out

and even then jigsaws shouldnt be used for trees

[strong tendon]

Thanks

[acoustic horizon]

Yes

Oh I just saw

Thanks! Will test

[sly forge]

np

[dense crow]

It seems like the jigsaw structure spawns on previously loaded chunks

[subtle plinth]

Yeah they do that sometimes

im pretty sure they cant spawn in chunks with in sim distance

[sly forge]

all structures do

if you haven’t modified the chunks it’s in, itll reload the chunks

the game only saves chunks that the player is in and the chunks that have been modified

this may be a bug with that system

[hard cipher]

The only problem I have is that jigsaw prefers to generate next to other jigsaw structures.

[sly forge]

i haven’t seen anyone modify the trial chambers yet somehow

trial chambers are one of two structures that can actually be modified

[subtle plinth]

I have

[subtle plinth]

Yeah we don’t have exclusion zones yet

[sly forge]

i havent seen it

:3

[subtle plinth]

I’ll get a picture later

[subtle plinth]

Here is one

[sly forge]

neat

[subtle plinth]

anyone here know how jigsaw pool aliases work?

i think i figured it out nvm

[subtle plinth]

actually i didn't

well this should work but it doesnt

the jigsaw links to the aliaes in the right image that i made but it doesnt work

the target name is also set to the name that is held by the jigsaws in the mobs connector jigsaw

[acoustic horizon]

Didn't work ):

[sly forge]

as i said its not perfect

[acoustic horizon]

That's the closest?

Or are there any other tricks I could try

[sly forge]

i mean you could try -15, 0 but that shouldnt make a difference

unfortunately, this is caused by Mojang not writing the features system correctly

[subtle plinth]

no shot that i actually spelled pool_aliases wrong and thats why it was broken

i gotta check now

it was actually my spelling

omg

im stupid

[sly forge]

wait are you using a structure template feature?

[strong tendon]

Yes. I think he's offline but we're working on the same thing.

[sly forge]

use tree features, might help

[strong tendon]

We decided to use structure since the tree doesn’t have a natural shape like the vanilla ones

But while we're at it, tree features won't be cut off, right?

[subtle plinth]

My jigsaw docs are getting updated with the 1.21.80 fields

Especially on pool_aliases and start_height. The latter being added and being really complicated and the former already having existed but was completely revamped.

[sly forge]

they shouldn’t, no

well

by chunk borders they will

srry i got mixed up with an unrelated tree question

[strong tendon]

Hey, I can test this but might as well ask in case you know. I think the -16 and south trick is working now. If I resave all structure in different rotations and add a weighted random feature, it should still simulate that random rotation placement of the structure without cutting them off, right?

[sly forge]

yep

random rotation has always had issues on bedrock

[strong tendon]

Thanks for your help!

[sly forge]

np

[raw abyss]

Is there a way to edit the new Flat worlds layers? Like in hight and blocks to use?

[misty pivot]

Unfortunately, I do not think you can.

[sly forge]

no

at least not yet

[subtle plinth]

i like pool_aliases

they are really useful when you figure out how to use them

[olive ridge]

what is this?

[thick sandal]

Does biome replacement work for the end and the nether?

[winged raft]

anybody can suggest basics tutorials here?

[upbeat barn]

No.

[upbeat barn]

For?

[winged raft]

generating structures

im planning to make a roguelike dungeon style structure

[upbeat barn]

Check the Bedrock wiki of ms docs.

[winged raft]

Thanks Smokey

[subtle plinth]

Pool aliases are a way for a jigsaw to reference a alias and then that alias depending on its type will redirect it to a template pool and every time a jigsaw block references the same alias the same pool will be used.

It can create themes in a structure

The trial chambers use it to determine the mob that each type of spawner will use

[sly forge]

no

[misty pivot]

Has anyone got their custom biomes to work? I've been using the replace_biomes component and turned on the Custom Biomes experimental toggle.

[subtle plinth]

It might just be stuck in preview rn because I can’t get mine to work in stable with the experiments

[dawn gale]

I got the partial biome overrides to function but they seem to only register during world creation

[haughty gull]

It is a fairly common error and is difficult to detect and it is the name of the biome if your biome is called "roofed" the name should be called roofed.biome.json

[misty pivot]

You were right, I added that to the file name and it worked now. Thanks!

[subtle plinth]

I should test mine on preview because it doesn’t work in stable

[misty pivot]

If u mean custom biomes, then it actually does, as long as the custom biomes toggle is on.

[subtle plinth]

I’ve not ever been able to get it to spawn at all

[misty pivot]

And u have the replace_biomes component?

[subtle plinth]

Yeah

I’ve tried nearly everything it just doesn’t spawn

/locate biome just doesn’t find it and it very obviously doesn’t spawn where it should

[misty pivot]

Is your BP biome file named YOURBIOME.biome.json?

[subtle plinth]

Yeah

And the client biome is luminous_forest.client_biome.json

[misty pivot]

Make sure both versions are set to 1.21.80 and make sure you have sea_material defined.

[subtle plinth]

yeah i have a sea material

[sly forge]

found your problem

you seriously need to keep up with the preview patch notes

they currently do not work with custom blocks atm, this is listed as a known issue

[subtle plinth]

ah

i thought it would because of the tutorial having the guy using custom white sand

[sly forge]

hmm…

it shouldn’t work

it may have been fixed in one of the newer previews

¯_(ツ)_/¯

turn content logs on in settings

[subtle plinth]

they are and i can see a error briefly before it is rushed past by other errors, mostly jigsaws

[sly forge]

check the file

[subtle plinth]

i can soon

it can't find one of the biome id's

it has 3 others and it doesnt replace any of them

[upbeat barn]

Thats not a thing on Bedrock.

Its mutated birch forest or something.

[subtle plinth]

alr

minecraft.wiki said that was the bedrock one

[subtle plinth]

Yooooo https://wiki.bedrock.dev/world-generation/jigsaw-structures i can now read my own docs and cringe!

[sly forge]

but are they clear and informative?

[subtle plinth]

I hope so, I tried my best to list everything need to program them

[dull obsidian]

could someone help me?? idk what is not working with my jigsaw structure, i thought i updated it but i guess i didn't do it properly

[subtle plinth]

”start_height” is invalid. I gtg in a moment so i cant explain but that is your problem

wait nvm

the weird phone formatting messed it up

ill have to check when i get home

[velvet spade]

anyone do world generation with scripting? i wanna know if i can somehow use my tree scripts for forests

[subtle plinth]

is roofed_forest a real biome, the structure set doesnt place this jigsaw but the command does

roofed_forest is what /locate biome displays

[dull obsidian]

the name for that biome is just "roofed"

[dull obsidian]

i jst noticed i had duplicated the heightmap_projection, idk if that was the only issue

[subtle plinth]

ty

[subtle plinth]

it probably is

[winged raft]

im trying to make a structure with jigsaw blocks however when I generate it through the structure blocks the jigsaw block does not trigger

[winged raft]

or does the jigsaw block not really trigger when is generated via structure blocks?

[subtle plinth]

Jigsaw blocks only trigger when /place or structure sets are placing them. Loading the structure file through a structure block will not.

[winged raft]

thanks

[twilit forum]

Sup

[thick sandal]

What are the changes to jigsaw structures in 1.21.80?

[hushed knot]

Can I make Custom Biomes?

Yes, starting from Preview 1.21.80.27, use the minecraft:replace_biomes component.

Please refer to the MS Docs for more information.

May 17, 2025, 12:03 AM

[muted garnet]

wait what YESSSSS

[winged raft]

how do I get my structure to spawn without the need for it to create a new world?

I want to create a structure that can only be spawned through script

[thick sandal]

after the update my jigsaw structures are now floating in the air?

how should i fix this?

[subtle plinth]

It’s a Mojang thing I think

[winged raft]

anybody know what files the jigsaw blocks needed to work?

pls help

[thick sandal]

Nah it was me, i messed up with start height

[subtle plinth]

Well there is a bug where structures will float rn

[subtle plinth]

A jigsaw file, a structure set(to generate naturally), a template pool or two, and a processor

[winged raft]

I don't want it to generate naturally tho

is that possible?

[subtle plinth]

Yeah, the structure set is what makes it spawn naturally so just don’t make one

[amber marsh]

is editing terrain generation possible on bedrock?

[sly forge]

editing no

overriding with black magic that was never meant to exist? yes

[winged raft]

after that will my structure appear in /place?

[subtle plinth]

Yeah

[winged raft]

also im a bit confused in the location part, I can't export the prefix how do I adress them instead?

[subtle plinth]

It’s just a file path in the location field

The prefix doesn’t need to be there

[winged raft]

what about the prefix?

ohh I see

so BP -> Structures -> structure.mcstructure

to just adress my structure I just basically do

"location": "structure"

I don't see it in /place

[subtle plinth]

Hmm

I’m gonna have to go soon but the jigsaw docs in ms learn and wiki.bedrock.dev should explain them well

[winged raft]

im confused

I also used the docs sample

and it didn't work

[subtle plinth]

For the file in the jigsaw_structures folder?

[winged raft]

yeah

https://learn.microsoft.com/en-us/minecraft/creator/documents/structures/introductiontojigsawstructures?view=minecraft-bedrock-stable

I downloaded their sample pack

but it didn't work when I /place it

[subtle plinth]

There is a fully working one on wiki.bedrock.dev

I haven’t tested it but I’ve written a good 15 of them

https://wiki.bedrock.dev/world-generation/jigsaw-structures#jigsaw-structures

[winged raft]

thanks

[winged raft]

wait where is it?

I cant see mto find it

[subtle plinth]

https://wiki.bedrock.dev/world-generation/jigsaw-structures#full-example

The full example is there

It’s just further down

[winged raft]

do I just /place structure?

how does /feature works?

to be honest im so confused I looked at java and it looked so simple I thought it was the same as bedrock

[subtle plinth]

Yeah /place should work once all the required fields in the template pool and jigsaw structure file are met

[subtle plinth]

It is basically the same

The bedrock and Java systems are borderline identical

[winged raft]

also the structure needs the jigsaw right?

[subtle plinth]

Jigsaw structures don’t technically need a single jigsaw block

I have a structure which can spawn without a single jigsaw

I gtg though

[winged raft]

is there a sample that works so that I could slowly learn it?

welp see ya

[subtle plinth]

Most Java tutorials will work for the most part

[winged raft]

also java jigsaw blocks has generate button

[sly forge]

they fixed it

[subtle plinth]

Yeah

I’ve got like 6 structures to test and I’m very excited

I’ll test it with my custom village and outposts tonight

[glad sinew]

What is currently the best tutorial for learning Jigsaw structures? Feel free to ping with a reply, I wanna learn how this stuff works!

[subtle plinth]

Microsoft learn or wiki.bedrock.dev

||I wrote the wiki page on jigsaws so it’s better||

[glad sinew]

Can you link the page you wrote on the wiki dev? I’m not at my desktop right now and searching through that page on the mobile version isn’t working for me 😂😅

[subtle plinth]

https://wiki.bedrock.dev/world-generation/jigsaw-structures

Yeah

[glad sinew]

Thank you kindly! I get generally how they work, just need to understand how to set up the pools of structures that specifically generate together and whatnot

[subtle plinth]

good start with the terrain matching bug fix

the base plate had all the sub structures and tower generate fine

ultimate challenge, the village generated without floating things

the village seems to have stopped spawning platforms beneath the buildings however

[sly forge]

actually i dont think thats it

the vanilla game had a preview bug like this at some point in time where in some villages, all the structures were shifted down by one block

thats what seems to be happening in the swamp village

[sly forge]

nvm turns out its not a jigsaw issue, its intentional

its supposed to do that with /place

it doesnt when naturally generated

[subtle plinth]

well that is naturally generated

[sly forge]

hmm

weird

Poggy doesnt have this issue

did you turn on the jigsaw setting that turns those platforms on?

[subtle plinth]

it has beard_thin as the terrain adaptation

[winged raft]

I finally figured it out however when I generate the first structure with the jigsaw block it only turns to air and does not generate the second structure

here's all the stuff I have

jigsaw_strustures
-> test.json
#this is for the /place structure

template_pools
->test.json
#contain the test1 structure where the jigsaw block is located

->test2.json
#contains the test2 structure location and the one that the jigsaw blocks target

[subtle plinth]

That jigsaw block needs to have the target name field filled in

If you want it to generate the other building then you should set that jigsaw blocks target name to whatever the jigsaw block in the other structure has for a name field

[sly forge]

@subtle plinth turns out im sorta correct here

it looks like it's water causing it

its not that the platforms dont exist

its that theyre being placed lower than they should be

[subtle plinth]

That’s weird

[winged raft]

do structure blocks not retain the entity tags?

[subtle plinth]

I do believe that they keep entities now but only jigsaws load them

[sacred dune]

if i have a build of a custom village there is a way to spawn in the world as a village? i think to use feature but having limits on the constructions I don't think it works

[upbeat barn]

You can use jigsaws.

[dusty oar]

can you generate 'invalid' blocks (like in the stripelands)?

[small latch]

I have the same lol

a 64x64x64 structure, Lags alot and I dont feel like doing jigsaws for it yet

Only lags due to mob spawning

[dusty oar]

ok

[dusty oar]

[quasi goblet]

[2025-05-26 16:00:55.854 ERROR] [Level] [FeatureRegistry] Feature rule minecraft:gravel_feature_rule can't place internal feature type.
[2025-05-26 16:00:55.854 ERROR] [Level]```

im getting this error on BDS, but the world works fine on singleplayer

[sly forge]

recent change Mojang made and its insanely stupid

you cant place any internal features using feature rules anymore

which breaks ALL void packs

im sorry to say but Castaway island generation is probably gonna have to be on hold til custom biomes are fully stable, at least the biome replacement stuff

[broken vector]

Hey guys, I am working on a really amazing project inspired by star wars mash-up, but it takes place in prequel era

I ran into a problem that when converting from java to bedrock, the world starts generating terrain and structures in the void world. Is there any way to fix this?

[upbeat barn]

Do you just want a void world?

[broken vector]

I’ve figured it out thankfully!

[hard kiln]

Good evening
I created a block (a plant) and I would like to generate it in specific biomes such as the plains, can you help me please? (Is it possible to inject a custom block into a vanilla biome? Or do I have to create a new biome that imitates the plains but will only be composed of a block that is the plant?)

[wanton flare]

Is there an easy way, addon or not, to generate a void world?

[upbeat barn]

Flat worlds exist.

[wanton flare]

As in, flat with custom blocks being set to air? It's for a skyblocks setup

[upbeat barn]

Bedrock has superflat presets now.

[wanton flare]

Ahhh I see, thanks!

[amber marsh]

are there any terrain generation addons why do i feel like i cant find any that actually alter the terrain significantly like javas terralith? or is it not possible

[subtle plinth]

we can't modify terrain generation outside of biomes, features, and structures

[small latch]

Yes

https://superflat.crackedmagnet.com/

Custom Superflats or single biome normal worlds

Custom superflat I think allows for voids

[coarse dock]

What should be done so that my structure doesn't float like this?

[subtle plinth]

Is it a jigsaw or a feature?

[coarse dock]

feature

[subtle plinth]

Oh, then I don’t know

[dense quail]

Use grounded condition in the structure temple feature

[coarse dock]

this?

no work

[dense quail]

Considering the size of your terrain, the structure will become quite rare as there is rarely enough area for the whole base to be connected

I have never seen that grounded is not working, really weird

[coarse dock]

Are void blocks ignored?

[dense quail]

Might be the issue. Why would you want to have void blocks below your structure?

[sly forge]

from my experience this does nothing

it ignores the grounded constraint

[subtle plinth]

think i just found the new largest jigsaw bug

if i try to have a structure set that can place more then 2 structures the game won't load

[sly forge]

huh

whats this mean?

[subtle plinth]

Structure sets are supposed to be able to place multiple structures

The vanilla villages have one structure set because structure sets place with even distribution

When the structure set finds a spot it is supposed to be able to have multiple structures and choose which one to pick based on its biome filters but for some reason the world won’t load if I have a structure set with more then 1 structure

[sly forge]

well, shit

that causes a bunch of problems

[old minnow]

is there any known bug when it comes to custom biomes and custom top surface blocks causing surface features to not generate?

Set the normal top surface material back to a vanilla block and my surface features suddenly generated again

[upbeat barn]

Its a known issue as far as I know.

[oblique narwhal]

If I add a custom biome using the replace_biomes component, can that biome be linked to a client biome? The client biome that I have throws an error that it can't find a biome with the ID of the server-side biome definition no matter how I rename it.

[upbeat barn]

Is the file name setup corrwctly? As well as folder and id?

Did you reference the MS Docs?

[oblique narwhal]

I've been reading the MS Docs, yes. The server-side biome is loaded and it has affected the world generation.

The client biome and the server biome have identical namespaced IDs.

bp/biomes/test_biome.biome.json

{
    "format_version": "1.21.40",
    "minecraft:biome": {
        "description": {
            "identifier": "namespace:test_biome"
        },
        "components": {
            "minecraft:replace_biomes": {
                "replacements": [
                    {
                        "dimension": "minecraft:overworld",
                        "targets": [ "beach", "plains" ],
                        "amount": 0.5,
                        "noise_frequency_scale": 50
                    }
                ]
            },
            "minecraft:climate": {
                "temperature": 0.8,
                "downfall": 0.4,
                "snow_accumulation": [0.0, 0.125]
            },
            "minecraft:surface_parameters": {
                "sea_floor_depth": 16,
                "sea_floor_material": "minecraft:sand",
                "sea_material": "minecraft:water",
                "foundation_material": "minecraft:deepslate",
                "mid_material": "minecraft:stone",
                "top_material": "minecraft:gold_block"
            }
        }
    }
}

rp/biomes/test_biome.client_biome.json

{
    "format_version": "1.21.40",
    "minecraft:client_biome": {
        "description": {
            "identifier": "namespace:test_biome"
        },
        "components": {
            "minecraft:sky_color": {
                "sky_color": "#ff0000"
            },
            "minecraft:water_appearance": {
                "surface_color": "#00ff00"
            },
            "minecraft:grass_appearance": {
                "color": "#0000ff"
            }
        }
    }
}

[upbeat barn]

Remove the namespace for client.

[oblique narwhal]

Okay that worked.

But then how am I to make it Marketplace-compliant with the namespace requirements? I tried simply replacing the colons with underscores to make the namespace part of the ID, but it still didn't find it then. Would the server biome have to have the namespace as an actual namespace and be in the identifier?

It's so terribly janky. lol

[upbeat barn]

Theres a reason its still experimental.

[oblique narwhal]

Okay.

[oblique narwhal]

Trying to debug a custom feature.

bp/features/test_tree_feature.json

{
    "format_version": "1.13.0",
    "minecraft:tree_feature": {
        "description": {
            "identifier": "namespace:test_tree_feature"
        },
        // Stuff defining the feature, not important
    }
}

bp/feature_rules/test_tree_feature_rule.json

{
    "format_version": "1.13.0",
    "minecraft:feature_rules": {
        "description": {
            "identifier": "namespace:test_tree_feature_rule",
            "places_feature": "namespace:test_tree_feature"
        },
        "conditions": {
            "placement_pass": "surface_pass",
            "minecraft:biome_filter": {
                "test": "has_biome_tag",
                "operator": "==",
                "value": "overworld"
            }
        },
        "distribution": {
            "iterations": 1,
            "x": {
                "extent": [ 0, 16 ],
                "distribution": "uniform"
            },
            "y": "q.heightmap(v.worldx, v.worldz)",
            "z": {
                "extent": [ 0, 16 ],
                "distribution": "uniform"
            },
            "scatter_chance": {
                "numerator": 1,
                "denominator": 100
            }
        }
    }
}

bp/worldgen/test_biome.json

{
    "format_version": "1.13.0",
    "minecraft:biome_generation_rules": {
        "rules": [
            {
                "feature": "namespace:test_tree_feature_rule"
            }
        ]
    }
}

I am able to use /place feature namespace:test_tree_feature, and the feature is placed in the world. But running /place featurerule namespace:test_tree_feature_rule says Feature could not be placed at this location. The feature also does not appear in the test biome that I made yesterday. What am I missing?

[upbeat barn]

Thats not how it works...where did you get the 3rd code?

[oblique narwhal]

From this thread: #1376888454356402176 message

[upbeat barn]

That is not correct at all.

[oblique narwhal]

I don't know what is correct since the documentation barely references feature rules. :P

[upbeat barn]

You only need the feature/rule, not biome generation rules.

[upbeat barn]

???

Did you check the wiki and MS Docs...at all???

[oblique narwhal]

I've been checking them, yes.

I always check there first. I ask here when I hit a dead end.

Putting the worldgen file aside, what do you suppose is broken with the feature rule? And how would I make it spawn in a particular biome?

[upbeat barn]

Thats what the biome filter is.

[oblique narwhal]

Okay. Why isn't it spawning anywhere then?

Oh my. I increased the spawn rate, and suddenly they appear.

Ah, so the scatter_chance must refer to the chance of it appearing per chunk then. Okay.

Well that sorts that for now.

[acoustic horizon]

Is it possible to generate village-like structures without jigsaw?

[hard cipher]

I believe so, but you would need to use command blocks to load your structure.

[hard cipher]

Is it possible to load features from subfolders?

[subtle plinth]

I got ghost pinged 💀

[sly forge]

yes, but...

theres...a lot of caviats

best to just wait

[old minnow]

Any existing bug report perchance?

[upbeat barn]

Pretty sure its in the changelog.

[old minnow]

Let me see

[hushed knot]

Can I make Custom Biomes?

Yes, starting from Preview 1.21.80.27, use the minecraft:replace_biomes component.

Please refer to the MS Docs for more information.

Jun 8, 2025, 12:02 AM

[old minnow]

It's not listed in the initial changelog it seems.

Known issues: Mob spawning on custom blocks is not working, removing an add-on with a custom biome will cause issues, a total replacement of all biomes will cause the locate structure command to lag

[hard cipher]

Do you mean grass, flowers, these things? If so, it's probably because there's no way to put these blocks in custom blocks

[old minnow]

kinda

just placing pink concrete blocks currently, still doesnt work at all :(

white it does work with vanilla surface blocks

[acoustic horizon]

Yeah I imagined, thanks!

[acoustic horizon]

Agreed

[subtle plinth]

Processors got touched!

They have been unchanged since introduced!

AND A NEW ELEMENT

[subtle plinth]

It got fixed

Chunks no longer infinitely load

[sly forge]

yeah i saw

:3

[subtle plinth]

This is the peakest update ever

2 new processors

A new element

3 of the 4 jigsaw files got changed

Actually all 4 if you count the bug fix as a structure set fix

Sucks that we have to wait 2 updates to get them though

[valid stirrup]

does someone have a working example of a processor "minecraft:rule" with a predicate_type of "minecraft:block_state_match"?

I get this error which is weird
I'm refrencing this document
https://learn.microsoft.com/en-us/minecraft/creator/reference/content/worldgenreference/examples/jigsawprocessors?view=minecraft-bedrock-stable

[valid stirrup]

what format version is that?

[subtle plinth]

It’s in preview rn

1.21.100 previews

The current one

[royal ruin]

[Structure][warning]-Loading Jigsaw Structure .json files | Jigsaw Structure Template Pool .json file worldgen/template_pools/bleached_outskirts_road_pool.json | -> elements[9] -> projection: this member was found in the input, but is not present in the Schema

is anyone else getting this error in the latest preview?

[subtle plinth]

I can check when I get home this weekend

[muted sorrel]

do you already have some way to generate ponds?

[summer iris]

Your best bet really might be to use jigsaw structures and processors afaik

[subtle plinth]

jigsaws still work for me

this is 1.21.100.20

[summer iris]

They updated the schemas in 1.21.100 iirc. They want to closer match Java's template pool's JSON.

Before, you would have projection outside of element: {}

"elements": [
    {
      "element": {
        "element_type": "minecraft:single_pool_element",
        "location": "minecraft:ancient_city/city/entrance/entrance_connector",
        "processors": "minecraft:ancient_city_generic_degradation"
      },
      "projection": "rigid"
      "weight": 1
    }
]```

But since 1.21.100, it's inside of the object to match Java:
```json
{
      "element": {
        "element_type": "minecraft:single_pool_element",
        "location": "minecraft:ancient_city/city/entrance/entrance_connector",
        "processors": "minecraft:ancient_city_generic_degradation",
        "projection": "rigid"
      },
      "weight": 1
    }
]```

[summer iris]

It's a reply to this^

[subtle plinth]

Bruh

I have like 30 template pools to update

[royal ruin]

tysm!!!

[royal ruin]

Is there a way to fix terrain_matching elements growing over what appear to be trees and foliage? using raw_generation doesn't seem to fix it... These road pieces also seem to go overtop of "house" structures branching from the road as well.

[subtle plinth]

I’ve never seen it do that for me

[dense crow]

I wanted to ask if it is possible to replace the vanilla village with a jigsaw structure?

[sly forge]

no

just trail ruins and trial chambers for now

[dense crow]

I tested it and found it to be possible.

[sly forge]

weird

its not supposed to be possible

[dense crow]

This might be a bug or something else. Either way, vanilla villages are currently not editable, but they can be replaced

I did this by naming the Jigsaw structure to match the Java version

[timid quest]

So it should work for all of the vanilla structures?

[subtle plinth]

That’s very cursed

[wanton flare]

Is there a way to re-randomize ores so apps that find them with the seed don't work?

[sly forge]

well, kinda, yes

[wanton flare]

that makes it seem like it'd be really hard 😅

[sly forge]

it’s not

it’s just really easy to do

just

itll be offset from vanilla

[wanton flare]

I see, what's the best place on the Wiki to look? Just intro to world gen? I don't need all the biomes stuff

[sly forge]

i do not have time to check

[wanton flare]

Alr thanks, I'll browse through

[fast palm]

do jigsaws have the same capabilities as java ones?

[subtle plinth]

For what it’s worth yeah

We are missing some processors and I tp elements but otherwise they are pretty good off rn

[pine yoke]

Is it possible to add custom terrain? I read on bedrock.wiki

[strong tendon]

Does q.heightmap return the correct value even if I query a location that hasn't been loaded yet?

[sly forge]

well

technically yes

but you can’t modify the vanilla terrain itself

and you can’t make a void pack because mojang played dirty and took the ability to modify most vanilla features away

[pine yoke]

Thankyou.

[pine yoke]

I heard that we could even chang height limit, idk if it's true.

[sly forge]

you can but only if you set the world type to void, and it only works in the overworld

if you set it to void nothing generates

[pine yoke]

Cool

[trim egret]

#1386573567856218132

Can someone help me?

[hushed knot]

Info

This bot was created by SmokeyStack for the purpose of making a FAQ bot for the Bedrock Add-Ons Discord Server.

Managing Entries

To manage entries, please make a pull request on GitHub.

Source Code

GitHub

Jun 23, 2025, 12:02 AM

[valid stirrup]

is that still relevant? I'm trying to create a feature that stacks, I was hoping to use sequence feature for that, is there a fix for this issue?

[upbeat barn]

As far as I know it still is the case. Per the warning, use aggregate.

[valid stirrup]

can I use aggregate to stack single block features on each other?

[upbeat barn]

Yes.

[sly forge]

yes, and its used a lot for that

[old minnow]

You can still make void packs... can't you?

[sly forge]

technically yes but its quite difficult and annoying to do

[old minnow]

How come?

[sly forge]

because now you gotta make a crap ton of features and modify the existing feature rules

and theres upwards of a hundred

[old minnow]

Wha

Why not just a feature to replace everything w/ air at the final stage?

[sly forge]

because it doesnt work for a lot of features

especially dark oak forest features, which are no longer in the vanilla packs either, dark oak forest features are the biggest issue

[old minnow]

Do they just not get replaced at all?

[sly forge]

only partially

[winter fossil]

Is it still possible to use river_transformation to replace the river adjacent (or through) my biome?

[tiny idol]

How do I use worldgen?

I didn't find any documentation about

[haughty gull]

I'm using the new "minecraft:replace_biomes" component and I'm passing this:

[short gyro]

I have the same problem

[dense crow]

@subtle plinth @summer iris Hi! Is it not possible to add multiple structures to a structure_sets currently?

[sturdy lintel]

anyone knows how to solve this?

Cannot find behaviorpack structures definition: ""thom:copper_pyramid""

[dense crow]

Try exporting the structure again with "mystructure:"

[sturdy lintel]

i tried already

didnt work 😦

[dense crow]

Oh, it looks like you need to move the structure file out of the "thom" folder in the structures folder

[sturdy lintel]

same error

i need to create a folder named "mystructure"?

[upbeat barn]

That's just your editor being wrong then. Does it work in game?

[sturdy lintel]

doesnt work either

[short gyro]

[BiomeRegistry][error]-Invalid Biome file biomes/high_plains.json: -> minecraft:biome -> components -> minecraft:surface_parameters: this member was found in the input, but is not present in the Schema

[dense crow]

Change to "format_version": "1.13.0"

[sly forge]

that was fixed a couple previews ago now

[sturdy lintel]

somehow i fixed, thx

[hard cipher]

It seems like something common, where structures end up generating very close together.

[subtle plinth]

The bug making it glitch got fixed in 1.21.100 previews

[short gyro]

change the salt value

[hard cipher]

This works for structures of the same type not different

[short gyro]

well, if both your structures have the same salt value, they'll be generating on the same chunks

[hard cipher]

But they don't have the same value

[short gyro]

oh thats probably a bug then

mine was fixed when I changed the salt value to be different from the other one

[hard cipher]

Capable, because they don't generate exactly in the same place, in fact they generate close together like a jigsaw structure generated here and right up there there is another jigsaw structure

[subtle plinth]

Multiple jigsaws in the same spot means the salt, separation, and spacing values are the same

[short gyro]

can you help me with jigsaws biome filters? I'm used to feature rules, I don't think jigsaws work the same way

I'm trying to make it so my structure will only generate on oak forests and plains

[subtle plinth]

I think biome filters are the same as feature rules however neither feature rule or jigsaw biome filters are my strong suit so I doubt know if I would be able to help much

[short gyro]

no problem, I just keep getting errors on my console, even when structures are spawning

[subtle plinth]

Yeah mine also flags issues in the content log but they work fine so im not sure why

[subtle plinth]

for some reason large jigsaw pieces can generate offset from where they are supposed to

this same structure with the same insides generated just fine

[fast palm]

When will jigsaw blocks and custol biomes gonna be stable guys

[subtle plinth]

I think devs said that they are working on getting jigsaws stable in the near future

[sly forge]

unfortunately itll be quite a while before everything is stable for them 🫠

[old minnow]

weird

[jaunty kestrel]

Does anyone know other generator types for dimensions besides void?
all i can find is this:

"minecraft:generation": {"generator_type": "void"}

[upbeat barn]

THere is none.

[jaunty kestrel]

that sucks

can you write custom ones?

[upbeat barn]

No.

[jaunty kestrel]

ugh

[stuck widget]

I've got a question does Jsaw block work and if so would I have to make a dungeon room in a bit piece for a solo addon spawn randomly in the world

[tiny idol]

How do I start using this? (Sorry for my bad english)

I don't found anything about this system on the internet

[subtle plinth]

Yeah jigsaw blocks work rn

[subtle plinth]

Jigsaw files https://wiki.bedrock.dev/world-generation/jigsaw-structures

[tiny idol]

Thanks

💕

[undone junco]

what does that mean? its working but it gives me that error

[wanton flare]

Does anyone know where to find the info for vanilla ore generation feature JSONs? I just need to re-randomize/shift them from the seed to make diamond finding apps not work. Any ideas would be great thanks!

[oak cipher]

#1324376503848275980 message

[fringe junco]

Is there a guide for custom biomes?

[hushed knot]

Can I make Custom Biomes?

Yes, starting from Preview 1.21.80.27, use the minecraft:replace_biomes component.

Please refer to the MS Docs for more information.

Jul 7, 2025, 12:02 AM

[upbeat barn]

@fringe junco

[fringe junco]

So I've looked at this reference and tried to replicate it but I'm having some issues. My biome isn't replacing properly?

[oak cipher]

you dont have a prefix for the identifier

[fringe junco]

I added a prefix to the rose_desert, it changed nothing lmao

[upbeat barn]

Any content log? What version? Do you have the custom biome experiment turned on?

[fringe junco]

Bridge is actually telling me that adding a prefix is wrong

[upbeat barn]

Bridge is quite outdated for custom biomes as far as I know.

[fringe junco]

I do have custom biome experiment on, this is 1.21.93

[upbeat barn]

Is your file name named correctly?

[fringe junco]

It's rose_desert.json

I've got nothing in the content log

Do I also have to make a biome file to edit the base Desert?

[upbeat barn]

Needs to be rose_desert.biome.json

You also need the client biome file.

[fringe junco]

WORKED THANK YOU

[muted sorrel]

can we make cave biomes? i dont see deep dark/lush caves/dripstone caves biome file specific any of them being a caves biome

[upbeat barn]

Yes.

[muted sorrel]

how?

[upbeat barn]

https://x.com/SmokeyStack_/status/1909695864794214564?t=sfFQHqKsQ-8ztXhcFwQCEw&s=19

SmokeyStack (@SmokeyStack_)

Custom Biome Test 2 - Cave Biome #Minecraft

X · Apr 8, 2025, 7:52 PM

[upbeat barn]

Just set the replace target to the 3 existing cave biome.

[upbeat barn]

Anyone have an example jigsaw village pack? I've understood the basics really ... except how the structures are actually set up.

[upbeat barn]

Can anyone also explain how /place jigsaw actually works? The docs are confusing, I've only managed to do /place jigsaw mike:ns7x4 mike:ns7x4 15 but that doesn't explain what a jigsaw target is. It's also confusing that the first arg expects a pool path but its actually an identifier.

[subtle plinth]

I can make one

Or just copy my swamp village

[subtle plinth]

The target name is the name of the jigsaw block of a piece in the target pool you are looking for

[fringe junco]

So how exactly do marketplace addons fake custom biomes?

[upbeat barn]

Using features.

[fringe junco]

Yeah, I figured as much. I’m unsure how exactly features can create such a large space?

[upbeat barn]

Its a complicated process.

[fringe junco]

I’m picturing a gaussian scatter placing trees and the new grass

But this causes issues for custom structures placed inside the biome due to the weird structure cutoff bug (is there a fix to that?)

[dense crow]

you can try this world

[subtle plinth]

That looks like Java but it’s not. My head hurts

[fringe junco]

This is a dumb question, but I want a feature to attempt to generate on every XZ coordinate in a chunk

So like, to form a complete flat platform at Y 100

Do you all have any ideas?

[upbeat barn]

Use scatter feature to place single block feature.

[fringe junco]

I can handle the flat platform part, but idk how to configure the scatter feature

Oh!!! It’s the distribution setting, right)

Would that be fixed_grid?