An OpenGL 4.6 Image-Based Lighting & Physically Based Renderer
- learnopengl.com
- Fundamentals of Computer Graphics 4th Edition (Steve Marschner, Peter Shirley .et al)
- Real Shading in Unreal Engine 4. http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes_v2.pdf