A Unity Image Effect to reproduce the Clear Flags camera effect for mobile (Android/IOS)
##Make sure that you add the shader to the build: Edit -> Project Settings -> Graphics:
Always Included Shaders (increase by 1)
click the circle icon to the right of the blank array slot and select "Hidden/ClearFlagsImageEffect"
If you don't do this, you will get a black screen when the scene with the camera which has the effect is loaded once deployed to IOS/Android
Effect Example: