视差 Cubmap
https://chengkehan.github.io/LocalCubmap.html
http://www.manew.com/thread-93923-1-1.html
https://chengkehan.github.io
立方体纹理(cube map)
https://blog.csdn.net/huangzhipeng/article/details/7957233
【Unity Shaders】Reflecting Your World —— Unity3D中简单的Cubemap反射 -----冯乐乐 博客
https://blog.csdn.net/candycat1992/article/details/21827365
【Unity Shaders】Reflecting Your World —— 在Unity3D中创建Cubemaps
https://blog.csdn.net/candycat1992/article/details/21827365