Building Living World Creatures with Niagara | Unreal Fest Chicago 2026

As game worlds grow larger and more ambitious, making them feel truly alive becomes an increasingly complex challenge. Populating vast environments with creatures that react to the player, respond to the world, and remain performant at scale often requires more than traditional animation or AI-driven approaches.

In this session recorded at Unreal Fest Chicago 2026, we explore how Unreal Engine’s Niagara system can be used to drive player-aware, interactive living world creatures in a lightweight and scalable way.

These systems were originally developed and production-tested in Fortnite and are designed to scale to massive, dynamic worlds. You’ll see how Niagara can go beyond visual effects to power motion, behavior, and world interaction, while remaining efficient enough for large-scale environments.

We dive into practical production techniques, including how Niagara Data Channels enable ultra-efficient communication and state sharing, and how Niagara can be combined with Procedural Content Generation (PCG) to populate expansive worlds with believable, reactive life.

Whether you’re a technical artist, VFX artist, or gameplay developer, you’ll come away with a clear understanding of how to apply these production-proven techniques to build systemic creature ecosystems in your own project.

Find out more about using Unreal Engine to develop games here: unrealengine.com/uses/games

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