- As a starter Realtime Rendering [0]

- The siggraph courses on shading [1]. The 2017 course will be on 30th of July [2]. Current techniques from AAA engines.

- Papers from JCGT [3].

- Plus the paper collection from Ke-Sen Huang linking all graphics related conferences [4]

have fun reading

[0] http://www.realtimerendering.com/book.html

[1] http://blog.selfshadow.com/publications/s2016-shading-course

[2] http://blog.selfshadow.com/publications/s2017-shading-course...

[3] http://jcgt.org/read.html?reload=1

[4] http://kesen.realtimerendering.com/