CovertEngineā¢ is a 3D graphics engine that puts advanced 3D graphics capabilities in the hands of any .NET developer, be it for business, CAD or gaming applications. The engine was developed with a broad audience in mind offering access to various frameworks and architectures like DirectX, OpenGL , XNA, MonoGame, CUDA, OpenCL as well as Bullet Physics simulation.
Images taken from a prototype level for up and coming game project called 'The Wayward Isles' - Forums.tigsource.com