FTB Copycat Compat is a lightweight NeoForge mod that brings FTB Ultimine compatibility to Copycat blocks from Create and Copycats+.

Features

Chain Material Application: Hold the Ultimine key and right-click a copycat block with a BlockItem (e.g., a block of Iron, Andesite, etc.) to apply that material to all adjacent copycat blocks with the same shape.
Chain Material Removal: Hold the Ultimine key and right-click a copycat block with a Wrench to remove the material from all adjacent copycat blocks with the same shape and material.
Smart Matching: Only selects copycat blocks of the same type (shape) and same material, preventing accidental mismatches.
Compatible with Create & Copycats+: Works with vanilla Create copycat blocks and extends support to Copycats+ blocks via reflection.

How to Use

Install FTB Ultimine (required), Create (required), and optionally Copycats+.
Hold the FTB Ultimine key (default: ~ / backtick).
Right-click any copycat block with a BlockItem to set material, or with a Wrench to remove material.
The action will chain-apply to all adjacent matching copycat blocks.

Dependencies

Required: NeoForge 21.1.224+, Minecraft 1.21.1, Create 6.0.10+, FTB Ultimine 2101.1.15+
Optional: Copycats+ 3.0.4+

Compatibility

Fully compatible with Aero Reformation — when both mods are loaded, Aero Reformation handles the registration.
Client-side only features? No, logic runs on server. Single-player works fine.

Tips: Due to interaction issues between chain mining and Create's Wrench, using the Wrench to directly break copycat blocks may consume the block — this is not an issue caused by us.

Installing the Create: Ultimate mod can resolve this issue.

FTB Ultimine Copycat Compat