Fallen Lib Mod Wiki › FAQ
Fallen Lib Mod FAQ
10 questions players actually ask, answered.
Do I need to install Fallen Lib if I'm just playing with mods?
Only if another mod you're using lists Fallen Lib as a dependency—check your mod's requirements first. If it's required, install it alongside the dependent mod; it won't add content by itself.
How do I know if my patches are actually loading?
Check your latest.log file for patch initialization messages, or use the verification guide to confirm each patch's status. If a patch fails to load, the log will show which class or method couldn't be hooked.
Can I use Fallen Lib with Apotheosis to add custom gem effects?
Yes, on version 1.20.1 you can create a data pack to register custom gem bonuses that Apotheosis will recognize. The data pack guide walks through the JSON structure needed.
What's the difference between FallenPatch and FallenInserter?
FallenPatch hooks into specific classes to apply modifications cleanly, while FallenInserter lets you intercept and inspect (or replace) what a method returns at runtime. Use FallenPatch for structural changes and FallenInserter for value inspection.
Why are my mods conflicting even though I have Fallen Lib installed?
Fallen Lib reduces conflicts by providing a shared patching system, but it doesn't prevent all mod incompatibilities—check if the conflicting mods are both designed to work with Fallen Lib's patching tools. Some conflicts come from mods that don't use Fallen Lib at all.
Do I need to edit JSON config files myself?
Usually no—mods that depend on Fallen Lib include their own configuration files. Only edit them if a guide specifically tells you to customize patch behavior or version requirements.
Will Fallen Lib slow down my game?
Fallen Lib's runtime tools have minimal performance impact since they only hook into code during initialization. The overhead during gameplay is negligible compared to the mods using it.
Can I use Fallen Lib data packs without Apotheosis?
The gem bonus data pack feature is specific to Apotheosis on 1.20.1; without Apotheosis installed, that functionality won't work. Fallen Lib itself is version-agnostic for other uses.
What happens if a patch fails to load?
The mod depending on that patch may not work correctly or may disable itself—check the log for the specific error message, then verify the patch configuration and that all required classes exist. Updating or reinstalling the dependent mod usually fixes it.
How do I create a data pack for custom gem bonuses?
Create a data pack folder structure with JSON files defining your gem bonus properties, then place it in your world's datapacks folder. The custom gem bonuses guide shows the exact file paths and JSON format required.