Lightweight 3D Editor Fio Brings Back the Spirit of Radiant and Hammer

Fio democratizes professional 3D level design by delivering a complete feature set—real-time lighting, advanced shaders, entity-based game logic—in a lightweight, open-source package designed to run on resource-constrained hardware. Drawing inspiration from legendary editors like Radiant and Hammer, it challenges the assumption that powerful development tools must be heavy and expensive, making professional-grade editing accessible to any developer.