How to Add Loot from a Vanilla Loot Table to a Modded Dungeon Chest
Finding the Config File
After installing Loot Integrations, launch the game once so the config folder generates. Open your instance's config directory and look for the Loot Integrations config file (a .toml or .json depending on your loader). This file is where every integration rule lives. Open it in a plain text editor — not a word processor — so formatting stays intact.
Writing an Integration Entry
Inside the config you will find a section for loot table integrations. Each entry typically needs three things: the target loot table (the modded dungeon chest you want to fill), the source loot table (the vanilla or modded table whose items you want to pull in), and an amount or weight controlling how many rolls get injected. Add a new entry, set the target to the dungeon's loot table ID, set the source to the table you want to borrow from, then set the amount. Save the file.
Testing In-Game
Reload the world or restart the game so the config is re-read. Open a chest from the target structure (use creative or a structure-finding command to reach one quickly) and confirm the new items appear. If nothing changed, double-check that the loot table IDs are spelled exactly as they appear in the mod's files — a single typo silently disables the entry.