Packmakers

How to add in custom trees.

Three integration points

1. Tree configuration (JSON) — define trees via files in config/nostalgictrees/trees/. Each file is a single tree. The mod auto-generates all textures, models, blockstates, recipes, loot tables, and tags for you. No scripting needed. See Tree Config Schema.

2. KubeJS recipe scripts — add, remove, and modify the crafting recipes for chunks, resources, mutations, drying, saplings. See KubeJS Recipes → Getting Started.

3. Tags — every tree contributes items to auto-generated tags. See Tags.

Quick start

Use the Tree Config Generator to quickly create trees!

Optionally you can write it yourself. Below is a quick example.

Drop this at config/nostalgictrees/trees/uranium.json:

{
  "name": "uranium",
  "tier": "tier_4",
  "output_item": "mekanism:raw_uranium",
  "output_count": 1,
  "color": "4ADE3F",
  "required_mod": "mekanism" //<- optional field only used when mod is installed
}

Restart the world. A full uranium tree exists — sapling, log, stripped log, leaves, apple, chunk, honeycomb, crafting recipe, loot tables, models, tags. The required_mod gate ensures it only loads when Mekanism is present.

Pages to read next

• Tree Config Schema — how to define custom trees
• KubeJS → Getting Started — setup and the basic patterns
• Targeting Recipes — the id:/type:/output:/mod: filter system