Valve Resource Format Renderer

OpenGL-based rendering engine for Source 2 game assets. Powers the Source 2 Viewer.

⚠️ Breaking Changes Notice

The primary user of this library is the Source 2 Viewer. As such, updates may contain breaking changes and backwards incompatible API changes, as the viewer does not require backwards compatibility with older library versions. Additionally, Source 2 games themselves may update and change file formats at any time, which may necessitate breaking changes in this library. If you need to support newer file formats, you will need to update the library. That said, we do aim to support older file formats going back to the very first Source 2 project.

Features

• 3D Models & Maps - Renders compiled models (.vmdl_c), maps (.vwrld_c, .vmap_c)
• Physically-Based Rendering - Full PBR pipeline with metalness/roughness workflow
• Advanced Lighting - Dynamic shadows, lightmaps, environment maps, light probes, and fog systems
• Animation - Skeletal animation, morph targets, and flex animation support
• Particle Systems - Particle system with many operators supported (but many more need implementation)
• Materials & Shaders - Material system supporting complex shader features
• Debugging Tools - Render modes including normals, UVs, lightmaps, and wireframe visualization