# Iris

## [Download here](https://www.spigotmc.org/resources/iris-world-gen-custom-biome-colors.84586/)

## Enabling compatibility

### Step 1

Install [ItemsAdderBlocksInjector](https://www.spigotmc.org/resources/itemsadderblocksinjector.102078/) and <mark style="color:red;">don't remove it after installation!</mark>

### Step 2

Create your Iris world (follow their guides) and use your ItemsAdder custom blocks IDs as you would do with vanilla blocks.

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For example open this file of the `overworld` pack: `plugins\Iris\packs\overworld\biomes\mountain\mountain.json`

Then edit the layers settings to use a custom block, in this example the custom **Amethyst Block**:

```json
"layers": [
    {
        "minHeight": 1,
        "maxPerChunk": 21,
        "maxHeight": 80,
        "minPerChunk": 7,
        "minSize": 3,
        "maxSize": 7,
        "palette": [{ "block": "iasurvival:cassiterite_ore" }],
        "varience": 7
    },
```

This will generate a similar result:

![](https://708574821-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M28TcKgSDvuFN510qye-887967055%2Fuploads%2Fgit-blob-ce935f2942ae4721848bff5b9c879a8233fb3ac5%2Fimage.png?alt=media)

![](https://708574821-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M28TcKgSDvuFN510qye-887967055%2Fuploads%2Fgit-blob-5d4f76cffc2bd85ac974644e7f0d1a96737113fb%2Fimage.png?alt=media)

## Compatibility issues

* FastAsyncWorldEdit will stop working, there is nothing I can do about that.
* WorldEdit `//undo` and `//copy` won't work with the custom blocks placed by `Iris`, they would be reverted back to `NOTE_BLOCK` (or `mushroom`, `TRIPWIRE`, `CHORUS_PLANT`)