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Olimpos Core

The core mod of the Project Olimpos modpack (Forge 1.20.1): bug fixes, performance improvements and compatibility tweaks for the mods in the pack. Made and tested for Project Olimpos only.
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Olimpos Core 1.1

File nameolimposcore-1.1.jar
Uploader
VaartemisVaartemis
Uploaded
Oct 2, 2026
Downloads
8
Size
65.6 KB
Mod Loaders
Forge
File ID
9036255
Type
R
Release
Supported game versions
  • 1.20.1

Curse Maven Snippet

Forge

implementation fg.deobf("curse.maven:olimpos-core-1720334:9036255")

Learn more about Curse Maven

What's new

Olimpos Core 1.1

Performance
- Item Stages + JEI: only the items that changed are hidden or shown (unlocking a skill used to freeze the game for 20+ seconds).
- JEI low-memory search uses an index; the first sync after JEI loads went from 5-6 s to about 1 s.
- JEI "$" tooltip search is cached after the first use.
- The creative inventory reuses the tabs JEI already built (no freeze when opening it).
- Emojiful: plain text skips the emoji check (screens with a lot of text no longer freeze).
- New: freezes longer than 1 second are written to the log with what the game was doing.

Fixes
- Passive Skill Tree: stacking effects now stack; typed damage (thorns) uses its damage type; learning skills and gaining points run on the server thread and skill limits are checked on the server; skill descriptions work on dedicated servers.
- Alshanex's Familiars: familiars find their spell lists again (no more "Tag ... is not known/registered!" log spam); the Guardian Angel tooltip no longer crashes the game.
- JEI no longer shows "Recipe By: KubeJS".

Project Olimpos
- Race-exclusive spells (config/olimposcore/race_exclusive_spells.json) never appear in Iron's Spellbooks loot or scroll trades.

Install it on the server too: skill descriptions need it on both sides.

This mod has no additional files