For past 2 days i'm testing crt-pi shader on GPD XD.
I really like it for it's performance based, but without "integer scale"(which crops image and leave black borders or stretchs image to much) it's impossible to get proper scanlines without artefacts especialy with curvature=on(and i really like that effect).
So i decided to just turn scan lines off and try to add them as an overlay image.
I added a layer with scan lines.
And i've experimented with opacity of them a bit.
Here's what I got with crt-pi shader (curvature=on; scanlines=off)
Click on image to see difference more detail
Original look without scan lines▼
Opacity of scan lines=30%▼
Opacity of scan lines=35%▼
Opacity of scan lines=40%▼

So, what do you guys think? Is this looks ok?