Networking Basics (Blueprint)

📚 Networking Documentation & Resources

Core Networking Concepts:

• 📖 Networking and Multiplayer - Complete networking overview
• 📖 Blueprint Networking - Blueprint-specific multiplayer patterns
• 📖 Replication - Variable and component replication
• 📖 RPCs (Remote Procedure Calls) - Server, client, and multicast functions

Advanced Networking:

• 📖 Network Authority - Authority patterns and validation
• 📖 Network Performance - Bandwidth and optimization
• 📖 Dedicated Servers - Server deployment guide

Multiplayer Video Tutorials:

• 🎥 Advanced RPC Patterns - Complex multiplayer interactions
• 🎥 Client Prediction - Lag compensation techniques
• 🎥 Network Profiling - Multiplayer performance analysis

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🌐 Multiplayer Architecture

What/Why: Build multiplayer-ready Blueprints with clear authority, replication, and RPCs.

Prereqs

• Understand listen vs dedicated server; PIE with multiple clients

Steps

1. Authority

• Use Has Authority to guard server logic; clients request via Server RPCs

2. Replication

• Mark relevant variables and components replicated; implement OnRep handlers

3. RPC patterns

• Server_, Multicast_, Client_*; throttle and batch updates

4. Movement and input

• Use built-in movement replication; avoid custom per-tick RPCs

Data

• Replicate IDs and small payloads; resolve data client-side

Performance

• Compress where possible; avoid chatty RPCs; profile packet sizes

Testing

• PIE with 2+ clients; validate authority, replication, and latency behavior

Suggested prompts

• “Show a Server RPC from owning client to pick up an item, and a Multicast to play FX.”
• “Convert per-tick updates to batched events with replication.”
• “Checklist for common replication pitfalls in Blueprints.”

Prompts for this example

• “Write OnRep logic to update equipped mesh when EquippedItemId changes.”