---
title: Networking
product: Advanced Framework Pro
version: 1.0
engine: Unreal Engine 5.8
updated: 2026-10-05
canonical: https://docs.human-codeable.com/concepts/networking.html
---

# Networking

Multiplayer is a first-class concern rather than a later addition.

**Transform replication.** `BPC_Replication` interpolates towards the replicated transform with a tolerance threshold and an adaptive sample rate — roughly 0.06 s while an object is moving, 0.5 s when it is at rest — and replicates with `SkipOwner` so the player manipulating an object is not corrected by their own data. Subclasses target either the whole actor (`BPC_Replication_Actor`) or a tagged component (`BPC_Replication_Component`).

**Server RPCs from non-pawns.** Unreal normally only routes client-to-server RPCs from the player's pawn. `UAFPNetDriver` overrides `ShouldCallRemoteFunction` and `ProcessRemoteFunction` so any object implementing the marker interface `IOutsidePawnRPCInterface` may call server RPCs directly. This is installed through `AFL_Libraries/Config/Engine.ini`, which replaces the default `GameNetDriver`. `BPC_State` and `BPC_Interaction_Select` already rely on it. Multicast and client RPCs are unaffected.

**Replicated UI.** `URenderTargetReplicatorComponent` JPEG-compresses a render target and multicasts it. Together with `BPC_ReplicatedUI` and its "fake UI" registration, this is how one player sees another player's interface.

![Standard RPC routing versus AFPNetDriver](../images/diagram_netdriver_rpc.svg?v=4126f63f)

Standard RPC routing versus AFPNetDriver

![Transform replication with adaptive tick and owner skip](../images/diagram_replication_flow.svg?v=7b9d18d7)

Transform replication with adaptive tick and owner skip