Your kirby looks very beautiful and clean.
But my own has a very big amount of static-interference-noise. Do you know if there’s some way to get close enough to this type of looking?
My suspicision is that the pin being connected to TV is already damaged and can’t deliver proper image.
The only feature in whole retroarch I’ve seen something similar is this so called “Noise” on the bottom from presets, that for example can be found in guest.r’s CRT NTSC preset.
As far as I know, the static cannot be reproduced in other cables like RGB or composite video.
This RF cable has a very thin pin that I can imagine, gets worse over time.