Overlay

This is for expert resourcepacks artists.

Vanilla overlays are supported by ItemsAdder.

You can create your own pack.mcmeta and put your overlays entries there. ItemsAdder will merge them all into the resulting pack.mcmeta of your pack .zip file.

Minecraft Wiki information

pack.mcmeta – Minecraft WikiMinecraft Wiki

Pack format version for each Minecraft version

Technical Changelog - Minecraft 1.20, 1.21, 26.1misode.github.io

Example

contents/myassets/resourcepack/assets/minecraft/pack.mcmeta

pack.mcmeta

{
   "pack":{
      "pack_format":63,
      "description":"My Pack"
   },
   "overlays":{
      "entries":[
         {
            "directory":"my_overlay_1",
            "formats":[
               42,
               43
            ]
         },
         {
            "directory":"my_overlay_3",
            "formats":[
               44,
               47
            ]
         }
      ]
   }
}