Free UE 5.8 Mass Entity (ECS) Sample Project: Community MassSample

Overview

The Community Mass Sample by Karl Mavko (Megafunk) and Alvaro Jover (vorixo) pairs community-written documentation with a small C++ sample project for Unreal Engine 5.8's experimental Mass Entity framework, Epic's entity-component-system architecture. It demonstrates entity configs, fragments and processors, Mass AI with StateTree, crowd representation and Instanced Static Mesh rendering, with a detailed README that explains each concept.

The MIT-licensed project is on GitHub and must be cloned with Git LFS (a zip download will not include the assets); it uses only engine-bundled Mass plugins but requires Visual Studio to compile. A key reference for programmers building large crowds or data-oriented gameplay in UE5.