The Block Asset Files

As part of creating a block, you will need to create the blockstate and model JSON files.

This is a vanilla feature, not GeckoLib specific, but it's included here since people often miss it.

The BlockState JSON

You will need to create a blockstate JSON for your block.

To do so, create a new .json file in your assets/<modid>/blockstates folder, with the same name as your registered Block.

In that file, copy-paste the below contents, replacing the examplemod placeholder with your mod's id, and example_block with your block's registered id.

{
  "variants": {
    "": {
      "model": "examplemod:block/example_block"
    }
  }
}

The Block Model JSON

You will also need to create a block model JSON for your block.

To do so, create a new .json file in your assets/<modid>/models/block folder, with the same name as your registered Block.

In that file, copy-paste the below contents, replacing the examplemod placeholder with your mod's id, and example_block with your block's registered id.

{
  "textures": {
    "particle": "examplemod:block/example_block"
  }
}

tip

You may also target another block entirely for your particle texture. Vanilla chests target oak planks, for example!