Compatibility.md

@@ -41,10 +41,13 @@ copy-resource-pack:
   merge_other_plugins_resourcepacks_folders:
   - MythicHUD/built-pack
 ```
-- Copy the `MythicHUD/built-pack/modern` folder (*or* the `modern-plus` folder, but NOT BOTH) into the `Itemsadder/Contents` folder.
+- Copy version core shaders into the `Itemsadder/Contents` folder:
+  - To support versions 1.20.5-1.21.1, copy the `MythicHUD/built-pack/modern` folder into the `Itemsadder/Contents` folder.
+  - To support versions 1.21.2+, copy the `MythicHUD/built-pack/modern-plus` folder into the `Itemsadder/Contents` folder.
+  - ⚠️You *cannot* use both, see "Overlays Issue" segment below
 - MythicHUD's pack elements should now merge on `/iazip` command.
 
-<details><summary>ItemsAdder Overlays Issue</summary>
+<details><summary>ℹ️ItemsAdder Overlays Issue</summary>
 As of March 2025, ItemsAdder does not seem to correctly support multi-layer resource pack elements, despite being [marked as a completed feature](https://github.com/PluginBugs/Issues-ItemsAdder/issues/4117).  
 An active ticket discussion about this is present in the [ItemsAdder Discord](https://discord.com/channels/533407895010803753/1346935281432924282/1346935281432924282).
 </details>