A 3D engine built in C# using OpenTK - it makes use of modern rendering techniques/shaders. 

Still in very active development.

Features

• 3D
• RenderTarget
• Environment-Mapping
• Reflections
• Shaders
• Per-Pixel Normal Mapping
• PBR
• Post-FX Processing
• OpenGL 4.5
• OpenTK
• Graphics Engine
• Integrated Development Environment