I am having issues with Unity 5 / Android and masking. In version 4.6 the mask works as expected. However, I can not get it to work at all in Unity 5.
I have attached two images of what it should look like and what it does look like if anyone could shed any light onto the matter please; do I need specific settings for Android etc??? I am currently working on a blank project to try and get this sorted, so there is no code at present, just the scene.
I searched a long time for the answer to this but I fixed this problem in Unity 5 by unchecking the "Disable Depth and Stencil*" Box.
Build Settings -> Player Settings -> Resolution and Presentation -> Disable Depth and Stencil
After that you need to re-launch unity (you will not see working mask if you dont)