Real-time Volumetric Clouds in UE5 by Max Coppen

Vapor is an open-source volumetric cloud rendering system I developed for Unreal Engine 5, inspired by the real-time cloud rendering techniques demonstrated in Horizon: Forbidden West. After studying several technical presentations published by Guerrilla Games on their proprietary cloud renderer, Nubis, I adapted and reimplemented core concepts within a custom UE5 pipeline. I developed Vapor over an eight-week period with the goal of reproducing high-fidelity volumetric cloudscapes at interactive frame rates. The full source code is publicly available on GitHub at https://github.com/mxcop/vapor.