GTU_V050 shader uneven scanlines on CRT Monitor with integer scale off

RetroArch General
#1

Hello, i recently acquired a new CRT vga monitor and i’ve been playing around with retroarch shaders mainly for Genesis / Snes / Ps1 cores and i came across one shader (GTU_V050) that is close to what i’m looking for.

Now the issue, shader looks beautiful when using integer scale but it doesn’t fill the whole 4:3 aspect ratio on the CRT itself and i get black borders all around, is there a way around this or is the only way is to adjust H-size / V-size on the CRT to stretch it till it fits the screen? If i turn off integer scale it does fill the whole screen but i get uneven scanlines.

#2

The way around this if the monitor controls are not enough or you don’t want to adjust with them is defining custom resolutions, e.g. 672p etc. depending on your needs.

1 Like
#3

Try to remove the 3rd pass (or enable no scanlines option) and then append a shader that does scanlines and keeps the image sharp but not bilinear like zfast-crt or gdv-mini or something.

1 Like
#4

The monitor controls are more than enough it’s just not convenient having to keep changing size values. So I went with your suggestion @Jamirus, added a new res (672p) and now i don’t have to fiddle with controls :+1:

I did try @DariusG suggestion as well but couldn’t get to work for some reason but that’s probably an issue on my end as i’m not used to this whole prepend / append shader options yet.

Thanks a lot guys!