0118

http://blog.sina.com.cn/s/blog_471132920101dayd.html

http://blog.csdn.net/candycat1992/article/details/40212735

http://ma-yidong.com/2016/08/12/shaderlab%E4%B8%AD%E7%9A%84%E7%A9%BA%E9%97%B4%E5%8F%98%E6%8D%A2/

http://blog.csdn.net/poem_qianmo/article/details/49719247

http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-13-normal-mapping/

http://www.surlybird.com/tutorials/TangentSpace/

http://blog.csdn.net/candycat1992/article/details/41605257

https://de45xmedrsdbp.cloudfront.net/Resources/files/2013SiggraphPresentationsNotes-26915738.pdf

directx 13 real time displacement map

micro geometry effect

http://blog.csdn.net/poem_qianmo/article/details/49719247