How to add a custom item/block to Minecraft Java | Blockbench | Page 1

lean jackal Oct 26, 2023, 4:20 PM

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Hi so I looked at how to add my custom item/block to minecraft using the !faq cmd but the thing is I don't want to replace any existing item in the game. Is there any other way to add items/blocks without replacing any existing ones.

frank roseBOT Oct 26, 2023, 4:20 PM

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Welcome to the help forum!

Please make sure to read #1029373817119838218 as it may answer your question!

Once your question has been resolved, please mark the post as closed by using the </close:1163944441741049897> command.

vestal widget Oct 26, 2023, 4:28 PM

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lean jackal Hi so I looked at how to add my custom item/block to minecraft using the `!faq` ...

(assuming you mean without mods)
In general, you can't add anything new that would pop up in the creative inventory if you mean that.

Items
You can't add completely new items, but you can tell the game to give an, for example, iron sword a different model when it has a CustomModelData:1 nbt tag.

Blocks
You can't add new blocks nor use any special nbt tag for this like you can for items.
Only thing you can do is tell the game to give different blockstate combinations of a block different models (so a stair facing north, being upside-down and a corner stair could look different to one facing south etc.).
Or you fake a block with a custom item on an item_display entity and a barrier in it if it needs a the hitbox.

lean jackal Oct 26, 2023, 4:36 PM

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Can you explain when it comes to adding custom items (using the custommodeldata thing) like what do I need to do to get it ingame

vestal widget Oct 26, 2023, 4:40 PM

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!faq custom_model_data

frank roseBOT Oct 26, 2023, 4:40 PM

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vestal widget !faq custom_model_data

FAQ

Java: Custom Model Data

!faq set custom_model_data Disclaimer: This only works for items (not placed blocks!) and only if you are in Java Edition 1.14 or later!

Example to give a stick 3 new models:
You'd place this file in YourResourcePack/assets/minecraft/models/item and call it stick.json.

stick.json

{
    "parent": "item/generated",
    "textures": {
        "layer0": "item/stick"
    },
    "overrides": [
        { "predicate": {"custom_model_data": 1}, "model": "item/custom_stick"},
        { "predicate": {"custom_model_data": 2}, "model": "custom/branch"},
        { "predicate": {"custom_model_data": 3}, "model": "block/stone"}
    ]
}``` Ingame you can give yourself one of the custom sticks by doing `/give <player> stick{CustomModelData:X}` (X being replaced by the number you want)

**Keep in mind:** 
Not all item models look like this. The overrides part basically always work this way, but the part before it has to have the **exact same** information as the default model  (assuming you don't wanna change how the normal item behaves/looks).
Not every item model uses "item/generated" as parent and defines one texture (for example **shields, bows, carved pumpkins** etc.). Additionally, if the default model already uses overrides (like for shields etc.) you need to add your overrides to the existing ones.

Hence always check the relevant model file in the default pack's models/**item** folder. (Type `!faq default-pack` for more info).
Preferably copy the default model into your pack and add your custom_model_data overrides into it.

**General knowledge/tips**
A model path is **always** relative to the "models" folder of your pack.
So `"item/custom_stick"` will load the model in `YourPack/assets/minecraft/models/`**`item`** called **custom_stick**.json;
while `"custom/branch"` will load the model in `YourPack/assets/minecraft/models`**`custom`** called **branch**.json;
and so on.

vestal widget Oct 26, 2023, 4:42 PM

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Depending on the item you use as base you need to adjust the part before "overrides" to be the same information as the item model in the default pack would have. Most pure items are like the one in the example. (Pure item = not a block in the inventory).

lean jackal Oct 26, 2023, 4:59 PM

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Ok so correct me if I'm wrong here.
If I want to add a custom item (eg: a ice sword) then I go to MyResourcePack/assets/minecraft/models/item and create a custom_sword.json file and in it I add this

    "parent": "item/generated",
    "textures": {
        "layer0": "item/iron_sword"
    },
    "overrides": [
        { "predicate": {"custom_model_data": 1}, "model": "item/ice_sword"},
    ]
}``` 

and in my `MyResourcePack/assets/minecraft/models/item` I have the `ice_sword.json` file.

So when I do `/give <player> iron_sword{CustomModelData:1}` I will get the item.

vestal widget Oct 26, 2023, 5:03 PM

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Well, idea wise yes, but a few small changes:
The parent for the iron_sword would be item/handheld (basically the same thing, just different display settings)
And you'd need to remove the , at the end of that predicate line (the last predicate never has a comma at the end)
(and in the command instead of <player> your username or a selector like @s ofc)

lean jackal Oct 26, 2023, 5:05 PM

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Ok I get it now

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Thank you so much for your help

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I just have another question how do I add like the damage the item does and stuff.

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I'm guessing thats done easily by other plugins that support custommodeldata items

vestal widget Oct 26, 2023, 5:08 PM

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either plugins or by defining attribute modifiers in the /give command
Pages like https://mcstacker.net/ are nice for the command usually. Just click on the /give button, select the item at the bottom, then adjust whatever you wanna adjust (name, lore, and other nbt))

lean jackal Oct 26, 2023, 5:08 PM

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lean jackal Ok so correct me if I'm wrong here. If I want to add a custom item (eg: a ice s...

Don't I need to have the texture file of the model in the resourcepack?

vestal widget Oct 26, 2023, 5:11 PM

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if it's not a default texture, yes

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like, you wont need iron_sword.png in your pack if you mean that

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but you will need the texture for your ice sword (unless your ice sword also uses default textures)

lean jackal Oct 26, 2023, 5:13 PM

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vestal widget like, you wont need iron_sword.png in your pack if you mean that

So I need to replace the default item texture? can't I have the game use that texture for that model?

vestal widget Oct 26, 2023, 5:13 PM

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no, as I said, you wont need iron_sword.png in your pack

lean jackal Oct 26, 2023, 5:14 PM

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oh ic

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so I can only get 1 model with its own texture per item

vestal widget Oct 26, 2023, 5:14 PM

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nah, you can have as many as you want

lean jackal Oct 26, 2023, 5:15 PM

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What folder do I upload the textures to?

vestal widget Oct 26, 2023, 5:15 PM

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This part just tells the game what the item looks like when it doesn't have a CustomModelData tag.
What it looks like with CustomModelData is completely independent of that part

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so you can have as many predicate lines as you have and each of those models you reference can have as many textures as you need

vestal widget Oct 26, 2023, 5:16 PM

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lean jackal What folder do I upload the textures to?

are you using web Blockbench or downloaded Blockbench?

lean jackal Oct 26, 2023, 5:16 PM

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downloaded

vestal widget Oct 26, 2023, 5:18 PM

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k, then you either:

have the textures anywhere in textures/item (or textures/block), and directly load/save textures from/to there from/to Blockbench (before exporting your model for the final time, else the texture reference in the model won't be correct)
have the textures in a custom folder inside the "textures" folder and add a small .json file to your pack to tell your pack that it is allowed to load textures from there too

lean jackal Oct 26, 2023, 5:21 PM

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alr thank you so much

#How to add a custom item/block to Minecraft Java