Rain Window Shader In a Night

Just follow tutorial from 'The Art of Code'

https://www.youtube.com/watch?v=EBrAdahFtuo

https://www.youtube.com/watch?v=0flY11lVCwY

Nothing new to be introduced, just try to adds tutorial comments

Blog post

UnityRainWindow folder

Unity project version: 14 materials/shaders for different phases and showcases

EgretRainyFilter folder

Egret project version: WebGL version shader code.