Unreal Engine 5 - How to Communicate Between Blueprints | Interfaces vs Casting & How to Use

In this Unreal Engine 5 tutorial, I’m breaking down how to properly communicate between Blueprints using Interfaces and Casting and clearing up some common confusion around both methods.

A lot of new developers get stuck when trying to:

Access variables from another Blueprint

Trigger events between unrelated Blueprints

Understand when to use an Interface vs. when it’s okay to cast

In this video, I’ll show you:
✅ How and when to use Blueprint Interfaces (not just for simple interactions!)
✅ How to pass information between any type of Blueprint using Interfaces
✅ When it’s perfectly fine to cast and when it becomes inefficient
✅ Why Blueprint Interfaces are so useful for reducing memory usage and dependencies
✅ How to set up modular, scalable Blueprint systems for your own projects

If you’re working on your first Unreal Engine 5 project or just want cleaner, more professional Blueprints, this video is for you!

Timecodes:

00:00 - Intro
01:54 - Interface for Interaction
08:48 - Pressing a button to open a door
13:30 - New Interface to communicate with other bps
17:45 - Passing a variable from one bp to another
22:49 - Communicating with multiple bps
28:00 - When casting is "ok"

#UnrealEngine5 #BlueprintCommunication #Interface

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