Hotbar item != Hand item

[proven frigate]

Is there a way without shaders to make the item in your hand have a different texture/be a different model, in the hotbar

[violet notch]

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[whole falcon]

yes in 1.21.4+ you can use an item definition file to make an item use different models depending on the "display context" so like in the inventory or in your hand

!faq java gui model

[violet notch]

FAQ

Java: Java Gui Model

Disclaimer: This will only work for 1.21.4 and newer. For older versions you will need to use mods or shader workarounds to do this.

To have a different model in the gui than in the hand (or other displays) you do the following

1. Create a new .json file in assets/minecraft/items (not to be confused with models/item!)
2. Make a .json file in there that looks something like this:

  {   
    "model": {
     "type": "minecraft:select",
     "property": "minecraft:display_context",
     "cases": [
       {
         "when": [
           "gui",
           "ground",
           "fixed"
         ],
         "model": {
           "type": "minecraft:model",
           "model": "minecraft:item/2d"
         }
       }
     ],
     "fallback": {
       "type": "minecraft:model",
       "model": "item/3d"
     }
   }
 }```
3. Name the .json the same as the id of the item you want to do this for (unless you are using this in combination with the item_model= component). 
4. Replace `item/2d` and `item/3d` with the repsective model references to the 3D and 2D model. Your "2D model" can be just something like this 
```json
{
   "parent": "item/generated",
   "textures": {
     "layer0": "item/feather"
   }
}``` (replace item/feather with your actual texture)

_Note: The bot example basically works the same as a trident. If you want the 2D model to appear in more/less displays adjust the  values in the "when" array accordingly._