Granite is a Vulkan-based real-time 3D rendering engine and application framework developed by Hans-Kristian Arntzen. It provides a comprehensive, modular library for building interactive graphics applications, including a high-level Vulkan abstraction, a declarative render graph with automatic resource management, scene loading (glTF, custom JSON), a full post-processing pipeline (TAA, SMAA, FXAA, HDR, bloom, SSAO, SSR), clustered and volumetric lighting, mesh shaders, and GPU-driven rendering. The framework also includes cross-platform audio (WASAPI, PulseAudio, Oboe) with DSP, video encoding/decoding via FFmpeg, a physics system (Bullet), a UI widget system, an entity-component system, and a flexible filesystem abstraction with network VFS support. The codebase is production-quality with advanced Vulkan feature usage, extensive tests, and tools for asset processing. While the author explicitly discourages external contributions, the repository remains actively maintained and showcases high craftsmanship in graphics engineering.