Grass: horizontal lines which are moving with the camera

Hello,
I´ve noticed that there is an odd problem with my grass. Difficult to explain, so please take a look at the image. There are horizontal lines which are always in a certain distance from the camera.


Does somebody know anything about this problem and how to solve it?
Thank you!

My bad. Problem solved. It´s necessary to set “Asotrophic Textures: Forced on”: Edit>Project Settings>Graphics