Black Stains pixelated on Android Device

Hello guys, I have a problem with differents black stains than appear in my Sony Z3 when I run the project. In the previewer all looks good. If someone know what can be I would really appreciate your help.

Here is a screenshot of the stain.

https://dl.dropboxusercontent.com/u/60119822/UE4%20Problems/Screenshot_2015-04-24-02-11-36.png

What was the issue? I have this on all android devices.