Install ItemsAdderBlocksInjector and don't remove it after installation!
Create your Iris world (follow their guides) and use your ItemsAdder custom blocks IDs as you would do with vanilla blocks.
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:
"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:
- FastAsyncWorldEdit will stop working, there is nothing I can do about that.
- WorldEdit
//undo
and//copy
won't work with the custom blocks placed byIris
, they would be reverted back toNOTE_BLOCK
(ormushroom
,TRIPWIRE
,CHORUS_PLANT
)