This guide is intended for people wishing to help with the creation of the mod. It assumes you know the basics of git and java. Guide aimed on InteliJ IDEA. Sorry, Eclipse is not covered but should be pretty similar.
RebornCore is now part of Tech Reborn repository. Thus there is no need for a separate step for RC setup anymore.
Gradle Settings
dialog from the Gradle tab. Change the Build and run using
and Run tests using
fields to 'IntelliJ IDEA'.File → Project Structure → Project
and set Project compiler output
to 'out' folder inside project folder