Fyrox is a feature-rich, production-ready game engine designed for developers who want to build 2D and 3D games using Rust. Originally known as rg3d, it provides a complete toolchain including a visual scene editor, physics system, rendering pipeline, and audio support—all in safe, performant Rust code. Fyrox is ideal for indie developers, game studios, and Rust enthusiasts seeking a modern alternative to C++-based engines like Unity or Unreal. With its strong focus on developer experience, documentation, and community support, Fyrox enables rapid prototyping and scalable game development without sacrificing performance or safety.
What You Get
- Built-in scene editor - A visual, drag-and-drop editor for designing game scenes with entities, components, and hierarchies without writing code.
- Production-ready 2D/3D rendering - Supports advanced lighting, shaders, post-processing effects, and physically based rendering (PBR) for high-fidelity visuals.
- Integrated physics engine - Includes collision detection, rigid body dynamics, and constraints for realistic game interactions.
- Cross-platform support - Compile and run games on Windows, Linux, and macOS with consistent behavior across platforms.
- Comprehensive documentation - Official Fyrox Book with tutorials covering everything from installation to advanced rendering techniques.
- Rust-first design - Full Rust API with zero-cost abstractions, memory safety guarantees, and no runtime dependencies.
- Web-based demos - Run live examples directly in the browser to explore engine capabilities without local installation.
Common Use Cases
- Building a cross-platform indie game with 3D environments - Developers use Fyrox to create visually rich games like platformers or RPGs that run natively on desktop OSes with minimal performance overhead.
- Prototyping a game mechanic in Rust - Engineers leverage Fyrox’s scene editor and scripting capabilities to rapidly test gameplay ideas without leaving the Rust ecosystem.
- Problem: Need a Rust-native engine to avoid C++ complexity → Solution: Fyrox provides safe, modular APIs for game logic, rendering, and audio without unsafe code bloat - Teams migrating from Unity or Godot to Rust use Fyrox to maintain performance while ensuring memory safety.
- Team of Rust developers building a multiplayer game - Developers use Fyrox’s modular architecture to share code between client and server, leveraging Rust’s concurrency model for networked game state synchronization.
Under The Hood
Fyrox is a Rust-based 3D game engine and real-time editor designed for interactive application development, emphasizing visual scripting and extensibility. It provides a powerful yet flexible environment that bridges the gap between traditional game engines and creative development tools.
Architecture
Fyrox adopts a modular, layered architecture that supports extensibility and seamless integration of custom systems. The engine is structured around distinct modules for rendering, audio, physics, and UI components.
- Plugin-based architecture enables developers to extend functionality without disrupting core engine behavior
- Component-based systems promote loose coupling and reusability across different parts of the engine
- Clear separation of concerns is evident in how rendering, input, and asset handling are encapsulated into dedicated modules
Tech Stack
Built entirely in Rust, Fyrox leverages the language’s performance and safety for high-fidelity 3D experiences. The engine integrates deeply with modern graphics and audio systems to deliver real-time editing capabilities.
- Primary language and frameworks: Rust with a focus on game engine development and real-time 3D editing
- Key dependencies and libraries: Extensive use of OpenGL and GPU-based rendering, supported by a rich ecosystem of Rust crates
- Build/development tools: Cargo-driven builds with Nix support for reproducible environments and consistent development workflows
- Testing frameworks: Comprehensive test coverage within the Rust ecosystem, ensuring stability across core modules and components
Code Quality
Code quality in Fyrox reflects a mature approach to testing and error handling, though some technical debt remains due to dynamic dispatch and tight coupling in core areas.
- Testing approach includes structured test organization and integration within the Rust ecosystem for robust module validation
- Error handling is consistently applied using standard Rust patterns to manage runtime exceptions and edge cases
- Code style and naming conventions are mostly consistent, supporting readability and maintainability across modules
- Some areas show signs of technical debt with overuse of dynamic dispatch and reduced modularity in core systems
What Makes It Unique
Fyrox stands out through its unique blend of powerful engine capabilities and visual scripting tools, making it accessible to both developers and designers.
- Modular architecture allows for easy plugin integration and customization without disrupting engine stability
- Visual scripting system empowers non-programmers to create complex behaviors through intuitive node-based interfaces
- Rich asset pipeline with real-time preview and dependency tracking accelerates iteration cycles in development workflows
- Strong focus on developer ergonomics with inspector tools and contextual UIs that support rapid prototyping