Compatibility Issues

ImmediatelyFast

When this mod is installed alongside ImmediatelyFast, it causes the high-transparency parts of the item background textures rendered in the hotbar to disappear. This makes the item background textures on the hotbar appear only three-quarters of their original size when using default textures. However, the rendering of item backgrounds within the GUI remains unaffected.

Disabling the ImmediatelyFast HUD batching feature will restore normal functionality.

EMI

When this mod is installed alongside EMI, the "Batch Processing" feature of EMI causes a large number of items in the EMI tab to not render their item backgrounds.

Disabling the "Batch Processing" feature of EMI will restore normal functionality.

zeta (fixed after 1201.9.2-fix)

When this mod is installed alongside zeta, it causes the game to crash during the loading phase due to a null pointer exception.

This issue has been fixed in version 1201.9.2-fix. Upgrading RarityCore to version 1201.9.2-fix or later will resolve the issue.

Sinytra Connector and certain Fabric mods (attempted fix after 1201.9.2-fix2)

It is currently known that when certain mods are installed alongside Sinytra Connector, they modify the API for obtaining vanilla item rarity, indirectly causing RarityCore to crash;

This mod has added a more comprehensive detection mechanism in version 1201.9.2-fix2. If the API is unavailable, the vanilla rarity conversion feature will be forcibly disabled to prevent crashes;

Currently, the author is unable to reproduce the issue. If you can identify which mods are causing the problem, please promptly provide feedback to the author.

FTB Quests / FTB Library (Item Border Rendering Compatibility)

RarityCore provides rendering compatibility for the FTB mod family (FTB Quests and its dependency FTB Library):

• Item icons in the quest interface — task icons, reward icons, quest map, emergency items, reward notifications, and completion toasts — will now display rarity borders correctly
• Item name colors and rarity info (level, stars) in item tooltips also work in FTB interfaces
• Border display follows the global "Item Border Rendering" toggle and per-level style configuration, consistent with other interfaces
• When FTB Library is not installed, this compatibility is automatically disabled with no impact on the game