pbr文章

http://www.cnblogs.com/jerrycg/p/4932031.html 重要分析公式， io 和ei


https://zhuanlan.zhihu.com/p/21376124 公式简化


http://www.qiujiawei.com/pbr-rendering/ 公式分析使用


http://www.qiujiawei.com/rendering-equation/ 公式推荐




https://zhuanlan.zhihu.com/p/21376124
http://www.cnblogs.com/jerrycg/p/4929119.html
http://www.qiujiawei.com/rendering-equation/
http://www.qiujiawei.com/pbr-rendering/
https://yushroom.github.io/2017/03/08/PBR/
https://github.com/mymei/UE4/blob/master/Engine/Shaders/BRDF.usf
https://github.com/mymei/UE4/blob/master/Engine/Shaders/DeferredLightingCommon.usf
http://qkxue.net/info/104950/PBR
http://www.cnblogs.com/TracePlus/p/4141833.html
https://github.com/JoeyDeVries/LearnOpenGL/blob/master/
http://tieba.baidu.com/p/3576904269
http://blog.sina.com.cn/s/blog_6084f5880101dpxl.html
http://blog.csdn.net/shenmifangke/article/details/51105092
学习3Ds Max/SubstancePainter模型制作-PBR纹理绘制视频教程[Gumroad出品]