Multiplayer Doors walks through building a door system that behaves flawlessly across clients and the server.
The tutorial covers server-authoritative interaction, replicated state handling, and smooth visual feedback for all players.
Overview
Doors are one of the most common multiplayer challenges for Unreal developers.
A simple "open on overlap" setup might work locally but quickly desyncs when replicated.
This tutorial breaks down the correct structure using clean, reliable logic that scales to larger projects.
What You’ll Learn
- How to replicate door state between server and clients
- When to use Server RPCs, Multicast, and RepNotify
- How to prevent double triggers and race conditions
- Blueprint structuring for modular, reusable door components
- Visual smoothing for consistent animation across all players
Approach
The system uses a single authoritative server call to control the door’s open and close logic.
Clients send lightweight requests, while the server validates and replicates state changes.
Animation events are then multicast to all connected players for perfect sync.
Every node and variable is explained, making it ideal for both beginners and seasoned developers refining their network architecture.
Result
By the end, you’ll have a fully functional, production-ready door Blueprint that you can drop into any multiplayer level.
It is clean, predictable, and easy to extend for locked doors, keypads, or timed events.
Learn the right way to open doors online.
