Welcome to Free PBR where you can download 100% free PBR materials and texture files.  My free PBR, or Physically-Based Rendering materials offer the metalness / roughness as well as the metallic / smoothness workflows.  These 2K texture maps can be used in Unreal Engine, Unity, Blender and many other 3D, Game Design, and CAD solutions. Now with 450+ FREE PBR Texture Sets and counting! 🙂