I haven’t been too happy with the shader scanlines, so I made an overlay that combines resolution specific scanlines and some tweaked RetroArch buttons. Just place the .png and .cfg files in a folder and point the RGUI there. Change the overlay opacity to about 30%-35%…
I’ve attached 2 different resolutions [1920x1080] and [1920x1200]. Make sure you grab the correct one.
It’ll probably only look correct if your screen resolution matches either 1920x1080 (most new phones) or 1920x1200 (Nexus 7 2013).
If you like scanlines, these look terrific and look to be the correct size, intensity and thickness [IMHO]
Enjoy!