2D Icon

This is to support clients older than 1.21.2. Minecraft 1.21.2 now supports 2D icons directly.

Refer to the modern tutorial here.

Step 1

Create the 2D icon for the furniture

Replace myitems with your own namespace.

info:
  namespace: myitems
items:
  2d_furniture:
    display_name: 2d_furniture
    permission: 2d_furniture
    resource:
      material: PAPER
      generate: true
      textures:
      - item/2d_furniture
    events:
      interact:
        right:
          place_furniture:
            furniture: furniture
            decrement_amount: true
        right_shift:
          place_furniture:
            furniture: furniture
            decrement_amount: true

Now create the 2d_furniture.png file inside the folder contents\myitems\resourcepack\myitems\textures\item\.

Step 2

Create the item which shows the placed furniture model. It is a different item form the one you see in the inventory (the one created in the step 1).

info:
  namespace: myitems
items:
  furniture:
    display_name: furniture
    permission: furniture
    lore:
    - 'lore-decorative-item'
    resource:
      material: PAPER
      generate: false
      model_path: decoration/furniture
    behaviours:
      furniture:
        solid: true
        cancel_drop: true
        hitbox:
          length: 1
          width: 1
          height: 1
    events:
      placed_armorstand:
        break:
          drop_item:
            item: 2d_furniture
  2d_furniture:
    display_name: 2d_furniture
    permission: 2d_furniture
    resource:
      material: PAPER
      generate: true
      textures:
      - item/2d_furniture
    events:
      interact:
        right:
          place_furniture:
            furniture: furniture
            decrement_amount: true
        right_shift:
          place_furniture:
            furniture: furniture
            decrement_amount: true

Now create the furniture.json file inside the folder dcontents\myitems\resourcepack\myitems\models\decoration\.

Done!

Now try to right click with the 2d_furniture item and you will see it places the furniture model.