B3DFramework is a large, MIT-licensed C++ game engine and real-time application framework, derived from the Banshee Engine codebase and still carrying many legacy `bsf`-prefixed module names. In production it provides a full game-development stack: a hybrid tiled-deferred/clustered-forward renderer with Vulkan, D3D12, and Metal backends; PhysX-based physics; OpenAL/FMOD audio; a comprehensive GUI toolkit; animation, particle, resource/importer, and scene/prefab systems; plus a Mono-based C# scripting layer with hundreds of generated interop wrappers. The engine is plugin-oriented, with renderers, GPU backends, physics, audio, and importers all loadable as dynamic libraries or statically registered modules, and it supports Windows, Linux, and macOS platform code. It also includes a headless/null backend path for CI and automated testing.