A drop-in dynamic weather state machine for Unreal Engine, built in C++ with full Blueprint access. One WeatherController actor gives your level networked, replicated weather transitions between Clear, Rain, and Storm states, with sky, lighting, fog, cloud coverage, and audio all blending together automatically.

KEY FEATURES

• Three built-in weather states (Clear / Rain / Storm) with smooth, time-based blending between them

• Fully networked and replicated: server-authoritative state, safe for multiplayer

• Data-asset-driven weather profiles (WeatherProfile) to tune cloud coverage, density, wind, and transition duration per state without touching code

• Reactive ground puddle system with accumulating, ripple-reactive wet-surface materials

• Per-footstep splash particles (Niagara) driven by physical surface state

• Camera-synced lightning flashes with randomized thunderclap timing and audio

• Volumetric cloud coverage and density driven live by the current weather state

• Procedural ambience, wind, and thunder audio system

• Auto-configure helper to wire up sensible material, audio, and VFX defaults on a fresh actor in one click

• Editor-viewport weather preview so you can see state changes without pressing Play

• Full C++ source included, with a Blueprint-exposed API (RequestWeatherState, GetCurrentState, and more)

WHAT'S INCLUDED

• WeatherController actor (C++, Blueprint-extendable)

• Three example WeatherProfile data assets (Clear / Rain / Storm)

• Niagara rain, ripple, and splash VFX

• Wet-surface and puddle materials

• Procedurally-generated ambience, thunder, and wind audio

• A fully-built demo map with six feature showcase booths

TECHNICAL DETAILS

• Engine: Unreal Engine 5.8

• C++ plugin, Blueprint accessible

• Network replicated: Yes

• Code modules: 1 runtime module