Learn to use this Early Access feature, but use caution when shipping with it.
This feature is Early Access.
Features available in Early Access give you the opportunity to learn how they work, plan your pipeline, and create test content. You should use caution when using these features in production, as we are still working to get to shipping-quality performance, stability, and platform support. We support backward compatibility for assets, and the APIs for these features are stable.

Multi-User Editing

Multi-User Editing

With Multi-User Editing, you can connect multiple instances of Unreal Editor together to work collaboratively in a shared editing session, building a single virtual world together with your teammates and colleagues in real time.

Multi-User Editing has been designed and tested in large-scale virtual film & TV production teams, where potentially dozens of operators work together on set during a live shoot. These operators work in Unreal Engine to design, build, and light the virtual world, emulating the way crews build physical sets. This helps the director, cast, and crew visualize the results of blending live action and CG content together while they rehearse and film live action shots, instead of having to wait for post-production.
To see Multi-User Editing in action, watch the realtime virtual production demo from SIGGRAPH 2018.
Reflections

Although Multi-User Editing was developed in the context of virtual film and TV production, the same kind of live collaboration is potentially useful for any scenario where you have multiple users that need to work on the same content. Any Unreal Engine development project may be able to use Multi-User Editing to reduce iteration times, get instant feedback on changes, and boost the team's creativity.

Getting Started

Reference